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Omega · Seamaster

Omega Seamaster Aqua Terra Shades 34 mm (calibre 8800)

Reference 220.20.34.20.10.001 · Classic · 34 mm

14Ø 34 mmLug-to-lug 40.5 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
220.20.34.20.10.001
Family
Seamaster
Category
Classic
Status
Current
Case material
Steel and rose gold, Steel and yellow gold
Case diameter
34 mm
Case thickness
11.98 mm Official
Lug-to-lug
40.5 mm Official
Lug width
16 mm Official
Water resistance
150 m
Bezel
—
Certifications
METAS Master Chronometer
Calibre
8800 Official
Power reserve
55 h
Frequency
25,200 vph (3.5 Hz)

Official product page · retrieved October 20, 2026

Does it fit your wrist?

Enter your wrist circumference. The watch appears to scale on the flat top of the wrist.

14Lug-to-lug 40.5 mmFlat top of the wrist 54.1 mm
Top view on a wrist, to scale
Flat top of the wrist 54.1 mmLug-to-lug 40.5 mmCase diameter 34 mm
Side view, across the wrist

Looks small

Lug-to-lug 40.5 mm on a flat top of 54.1 mm: 74 % of the width.

Lug-to-lug is under 75% of the flat top. Fine to wear, but the watch may look small on you.

Measurements and sources

Brands rarely publish thickness, lug width and lug-to-lug together. Each observation below is kept separate, with who gave it.

Case thickness

Value Type Source Date
11.98 mm Official Omega October 20, 2026

Lug-to-lug

Value Type Source Date
40.5 mm Official Omega October 20, 2026

Lug width

Lug width is the gap between the lugs, where the strap fits. It is not lug-to-lug.

Value Type Source Date
16 mm Official Omega October 20, 2026

Calibre source

Official Omega · retrieved October 20, 2026

Other versions in the same case

These references share this case and differ by metal, dial, bracelet or bezel. The figures on this page apply to all of them, except where a reference shows its own thickness.

Other Seamaster references

Watch Ø Thickness Lug-to-lug Calibre
Seamaster Aqua Terra Shades 34 mm (calibre 8801) 220.50.34.20.09.001 34 mm 11.98 mm 40.5 mm 8801
Seamaster Aqua Terra Shades 38 mm (calibre 8800) 220.20.38.20.09.001 38 mm 12.36 mm 45.1 mm 8800
Seamaster Aqua Terra 150M 30 mm (calibre 8750) 220.10.30.20.02.001 30 mm 10.55 mm 36.5 mm 8750
Seamaster Aqua Terra 150M 30 mm (calibre 8751) 220.50.30.20.09.001 30 mm 10.65 mm 36.42 mm 8751
Seamaster Aqua Terra 150M 38 mm 220.10.38.20.01.004 38 mm 12.26 mm 45.1 mm 8800
Seamaster Aqua Terra 150M 38 mm (Moonshine gold) 220.50.38.20.03.001 38 mm 12.26 mm 45.1 mm 8801
Seamaster Aqua Terra Shades 38 mm (calibre 8801) 220.53.38.20.10.001 38 mm 12.36 mm 45.1 mm 8801
Seamaster Aqua Terra 150M 41 mm (calibre 8900) 220.22.41.21.06.001 41 mm 13.2 mm 47.9 mm 8900
Seamaster Boutique Editions 39.5 mm 511.13.40.20.11.002 39.5 mm 11.76 mm 44.5 mm 8800
Seamaster Olympic Official Timekeeper 39.5 mm 522.53.40.20.04.003 39.5 mm 11.98 mm 44.5 mm 8807
Seamaster Aqua Terra 150M 41 mm 220.10.41.21.03.006 41 mm 13.26 mm 47.91 mm 8900
Seamaster Aqua Terra 150M 41 mm (calibre 8901) 220.52.41.21.03.001 41 mm 13.2 mm 47.9 mm 8901
Seamaster Aqua Terra 150M GMT Worldtimer 43 mm (Sedna gold) 220.53.43.22.02.001 43 mm 14.3 mm 50.3 mm 8939
Seamaster Aqua Terra 150M Small Seconds 41 mm 220.12.41.21.03.005 41 mm 13.2 mm 47.9 mm 8916
Seamaster Aqua Terra 150M Small Seconds 41 mm (Sedna gold) 220.52.41.21.03.002 41 mm 13.2 mm 47.9 mm 8917
Seamaster Aqua Terra 150M 38 mm (calibre 8800) 220.10.38.20.03.001Discontinued 38 mm 12.24 mm 45 mm 8800
Seamaster Aqua Terra 150M 38.5 mm 231.10.39.21.01.002Discontinued 38.5 mm 12.84 mm 45.5 mm 8500
Seamaster Aqua Terra 150M 41.5 mm (calibre 8500) 231.10.42.21.01.001Discontinued 41.5 mm 12.95 mm 48.5 mm 8500
Seamaster Aqua Terra 150M 41.5 mm (calibre 8508) 231.10.42.21.01.002Discontinued 41.5 mm 12.95 mm 48.5 mm 8508
Seamaster Railmaster 38 mm 235.12.38.20.06.001 38 mm 12.36 mm 44.92 mm 8806
Seamaster Railmaster Small Seconds 38 mm 235.10.38.20.13.001 38 mm 12.36 mm 44.92 mm 8804
Seamaster Diver 300M 36.25 mm 212.30.36.20.03.001Discontinued 36.25 mm 12.65 mm — 2500
Seamaster Diver 300M 42 mm (calibre 8800) 210.22.42.20.01.002 42 mm 13.56 mm 49.9 mm 8800
Seamaster 300 41 mm 234.30.41.21.01.001 41 mm 13.85 mm 48 mm 8912
Seamaster 300 41 mm (Bronze Gold) 234.92.41.21.10.001 41 mm 14.4 mm 48 mm 8912
Seamaster 300 41 mm (calibre 8913) 234.93.41.21.99.002 41 mm 14.65 mm 48 mm 8913
Seamaster Aqua Terra 150M GMT Worldtimer 43 mm 220.10.43.22.03.001 43 mm 14.12 mm 50.3 mm 8938
Seamaster Diver 300M 42 mm 210.30.42.20.01.001 42 mm 13.56 mm 49.9 mm 8800
Seamaster Diver 300M 42 mm (calibre 8801) 210.62.42.20.03.001 42 mm 13.56 mm 49.9 mm 8801
Seamaster Diver 300M 42 mm (calibre 8806, 14.23 mm high) 210.30.42.20.03.004 42 mm 14.23 mm 50 mm 8806
Seamaster Diver 300M 42 mm (calibre 8806) 210.32.42.20.01.005 42 mm 13.8 mm 49.7 mm 8806
Seamaster Diver 300M 42 mm (Sedna gold) 210.52.42.20.04.001 42 mm 13.92 mm 49.93 mm 8801
Seamaster Diver 300M 42 mm (titanium, no date) 210.90.42.20.01.001 42 mm 13.48 mm 49.6 mm 8806
Seamaster Diver 300M 43.5 mm (black ceramic) 210.92.44.20.01.003 43.5 mm 14.47 mm 51.5 mm 8806
Seamaster Diver 300M Chronograph 44 mm 210.32.44.51.01.002 44 mm 17.2 mm 52.8 mm 9900
Seamaster Diver 300M Chronograph 44 mm (Sedna gold) 210.62.44.51.01.001 44 mm 17.3 mm 52.8 mm 9901
Seamaster Planet Ocean 600M 42 mm 217.30.42.21.01.003 42 mm 13.79 mm 47.5 mm 8912
Seamaster Planet Ocean 600M GMT Worldtimer 45.5 mm 215.92.46.22.01.006 45.5 mm 17.38 mm 51.5 mm 8938
Seamaster Planet Ocean Ultra Deep 45.5 mm 215.30.46.21.03.001 45.5 mm 18.12 mm 51.9 mm 8912
Seamaster Railmaster 40 mm 220.10.40.20.01.001Discontinued 40 mm 12.65 mm 47 mm 8806
Seamaster Regatta Chronograph 46.75 mm (titanium) 216.92.46.79.10.001 46.75 mm 15.6 mm 50 mm 5701
Seamaster Planet Ocean 600M 37.5 mm 232.30.38.20.01.001Discontinued 37.5 mm — 43.5 mm 8520
Seamaster Planet Ocean 600M 39.5 mm 215.30.40.20.01.001Discontinued 39.5 mm 14.21 mm 45.6 mm 8800
Seamaster 300 41 mm (calibre 8400) 233.30.41.21.01.001Discontinued 41 mm 14.65 mm 48 mm 8400
Seamaster 300 M Quartz 41 mm 2264.50.00Discontinued 41 mm 11.6 mm 47.5 mm 1538
Seamaster Aqua Terra 150M Chronograph 44 mm 231.10.44.50.01.001Discontinued 44 mm 13.95 mm — 3313
Seamaster Aqua Terra 150M GMT 43 mm 231.10.43.22.01.001Discontinued 43 mm 14.15 mm 51.4 mm 8605
Seamaster Bullhead Chronograph 43 × 43 mm 225.12.43.50.04.001Discontinued 43 mm 14.85 mm 43 mm 3113
Seamaster Diver 300M 41 mm 212.30.41.20.01.003Discontinued 41 mm 13.07 mm 47.4 mm 2500
Seamaster Diver 300M Chronograph 41.5 mm (calibre 3330) 212.30.42.50.01.001Discontinued 41.5 mm 16.67 mm 48.9 mm 3330
Seamaster Diver 300M Chronograph 44 mm (previous model) 212.30.44.50.01.001Discontinued 44 mm 17.27 mm 52 mm 3330
Seamaster Planet Ocean 600M 42 mm (calibre 8500) 232.30.42.21.01.001Discontinued 42 mm 15.8 mm — 8500
Seamaster Planet Ocean 600M 43.5 mm 215.30.44.21.01.001Discontinued 43.5 mm 16.09 mm 49 mm 8900
Seamaster Planet Ocean 600M 45.5 mm 232.30.46.21.01.001Discontinued 45.5 mm 16.6 mm 51.51 mm 8500
Seamaster Planet Ocean 600M Chronograph 45.5 mm (calibre 9300) 232.30.46.51.01.001Discontinued 45.5 mm 19.25 mm 51.5 mm 9300
Seamaster Planet Ocean 600M Chronograph 45.5 mm (calibre 9900) 215.30.46.51.01.001Discontinued 45.5 mm 18.87 mm 52.3 mm 9900
Seamaster Planet Ocean 600M GMT 43.5 mm 215.30.44.22.01.001Discontinued 43.5 mm 17.04 mm 49.4 mm 8906
Seamaster Planet Ocean 600M GMT 43.5 mm (calibre 8605) 232.30.44.22.01.001Discontinued 43.5 mm 17.25 mm 49.2 mm 8605
Seamaster Planet Ocean Big Size 45.5 mm 2200.50.00Discontinued 45.5 mm 15.3 mm 51.5 mm 2500

Other Omega models

Watch Ø Thickness Lug-to-lug Calibre
Constellation Small Seconds 34 mm 131.10.34.20.02.001 34 mm 11.7 mm 37 mm 8802
Constellation Small Seconds 34 mm (Sedna gold) 131.58.34.20.61.001 34 mm 11.7 mm 36.9 mm 8803
De Ville Ladymatic 34 mm 425.30.34.20.55.002 34 mm 11.95 mm 41.6 mm 8520
De Ville Prestige 34 mm 434.10.34.20.05.001 34 mm 10.1 mm 39.38 mm 8800
Constellation Quartz 36 mm 131.10.36.60.01.001 36 mm — 39.1 mm 4564
De Ville Trésor Quartz 36 mm 428.17.36.60.04.001 36 mm 8.85 mm 42.7 mm 4061
Show 61 more
Watch Ø Thickness Lug-to-lug Calibre
Constellation 35 mm 123.10.35.20.01.001Discontinued 35 mm 10.76 mm 38.4 mm 2500
De Ville Prestige Quartz 30 mm 434.10.30.60.05.001 30 mm 7.29 mm 34.69 mm 4061
Constellation 29 mm 131.15.29.20.60.001 29 mm 12 mm 31.2 mm 8700
Constellation 39 mm 131.10.39.20.02.001 39 mm 12.43 mm 41 mm 8800
Constellation 41 mm 131.23.41.21.06.001 41 mm 13.45 mm 44 mm 8900
De Ville Prestige Date Hand 42 mm 434.20.42.22.02.001 42 mm 12.27 mm 48.95 mm 8936
De Ville Prestige Quartz 27.5 mm (calibre 4061) 434.20.28.60.02.001 27.5 mm 7.23 mm 31.92 mm 4061
Constellation Observatory 39.4 mm 140.13.39.21.02.001 39.4 mm 12.23 mm 47.2 mm 8914
Constellation Observatory 39.4 mm (calibre 8915) 140.53.39.21.99.002 39.4 mm 12.23 mm 47.2 mm 8915
Constellation 41 mm (yellow gold) 131.63.41.21.01.001 41 mm 13.5 mm 44 mm 8901
Constellation Quartz 25 mm 131.10.25.60.02.002 25 mm 8.11 mm 27.5 mm 4061
Constellation Quartz 28 mm 131.10.28.60.01.001 28 mm 8.48 mm 30.52 mm 4061
De Ville Mini Trésor Quartz 26 mm 428.17.26.60.04.008 26 mm 7.46 mm 31.13 mm 4061
De Ville Prestige 40 mm 434.10.40.20.10.001 40 mm 9.93 mm 46.26 mm 8800
De Ville Prestige 41 mm 434.13.41.21.03.002 41 mm 10.77 mm 47.89 mm 8810
De Ville Prestige Power Reserve 41 mm 434.53.41.21.02.001 41 mm 10.77 mm 47.89 mm 8810
De Ville Prestige Quartz 27.5 mm 434.10.28.60.10.001 27.5 mm 6.33 mm 31.92 mm 4061
De Ville Prestige Small Seconds 41 mm 434.10.41.20.02.001 41 mm 10.77 mm 47.89 mm 8802
De Ville Tourbillon 43 mm (Canopus gold) 529.53.43.22.99.001 43 mm 12.7 mm 49.2 mm 2640
De Ville Trésor 40 mm 435.13.40.21.02.001 40 mm 10.05 mm 44.8 mm 8910
De Ville Trésor Power Reserve 40 mm 435.13.40.22.01.001 40 mm 10.05 mm 44.8 mm 8934
De Ville Trésor Power Reserve 40 mm (yellow gold) 435.53.40.22.02.001 40 mm 10.65 mm 44.8 mm 8935
De Ville Trésor Small Seconds 40 mm 435.13.40.21.03.002 40 mm 10.05 mm 44.8 mm 8926
De Ville Trésor Small Seconds 40 mm (Sedna gold) 435.53.40.21.11.002 40 mm 10.65 mm 44.8 mm 8927
Constellation 38 mm 123.10.38.21.01.001Discontinued 38 mm 12.52 mm 41.7 mm 8500
Speedmaster 38 mm 324.30.38.50.02.001 38 mm 14.7 mm 44.9 mm 3330
Speedmaster 38 mm (calibre 3332) 324.30.38.50.01.002 38 mm 14.75 mm 44.96 mm 3332
Speedmaster Calibre 321 38.6 mm (Canopus gold) 311.50.39.30.01.001 38.6 mm 13.92 mm 48 mm 321
Speedmaster Calibre 321 311.30.40.30.01.001 39.7 mm 13.7 mm 48 mm 321
Speedmaster First OMEGA in Space 310.30.40.50.06.001 39.7 mm 13.38 mm 48 mm 3861
Speedmaster 310.92.44.50.01.001 44.25 mm 12.97 mm 50 mm 3869
Speedmaster '57 40.5 mm 332.10.41.51.01.001 40.5 mm 12.99 mm 49.64 mm 9906
Speedmaster Anniversary Series 42 mm 310.32.42.50.02.001 42 mm 14.47 mm 47.5 mm 3861
Speedmaster Calibre 321 42 mm (platinum) 311.93.42.30.99.001 42 mm 13.39 mm 47.6 mm 321
Speedmaster Chronoscope 43 mm 329.30.43.51.02.002 43 mm 12.8 mm 48.6 mm 9908
Speedmaster Chronoscope 43 mm (Moonshine gold) 522.60.43.51.02.001 43 mm 13 mm 48.6 mm 9909
Speedmaster Dark Side of the Moon 44.25 mm 310.92.44.51.01.001 44.25 mm 13.02 mm 50 mm 9908
Speedmaster Dark Side of the Moon 44.25 mm (calibre 9900) 310.92.44.51.01.004 44.25 mm 15.09 mm 50 mm 9900
Speedmaster Moonphase 43 mm 304.30.43.52.06.001 43 mm 13.61 mm 48.6 mm 9914
Speedmaster Moonphase 44.25 mm 304.30.44.52.01.001 44.25 mm 16.85 mm 50 mm 9904
Speedmaster Moonwatch Professional 310.60.42.50.01.001 42 mm 13.18 mm 47.5 mm 3861
Speedmaster Moonwatch Professional (Hesalite) 310.30.42.50.01.001 42 mm 13.54 mm 47.5 mm 3861
Speedmaster Moonwatch Professional (Moonshine gold, black dial) 310.60.42.50.01.002 42 mm 13.63 mm 47.46 mm 3861
Speedmaster Moonwatch Professional (sapphire) 310.30.42.50.01.002 42 mm 13.18 mm 47.5 mm 3861
Speedmaster Pilot 40.85 mm 332.10.41.51.01.002 40.85 mm 14.65 mm 49.6 mm 9900
Speedmaster Racing 44.25 mm (Sedna gold) 329.53.44.51.03.001 44.25 mm — 50 mm 9901
Speedmaster Racing Chronograph 44.25 mm 329.30.44.51.01.001 44.25 mm 14.92 mm 50 mm 9900
Speedmaster Super Racing 329.30.44.51.01.003 44.25 mm 14.9 mm 50 mm 9920
Speedmaster '57 Chronograph 38.6 mm 311.10.39.30.01.001Discontinued 38.6 mm — 48 mm 1861
Speedmaster Date 39 mm 3513.50.00Discontinued 39 mm 14 mm 45 mm 1152
Speedmaster Reduced 39 mm 3539.50.00Discontinued 39 mm 12.6 mm 44.7 mm 3220
Speedmaster Anniversary Series Chronograph 39.7 mm 311.32.40.30.01.001Discontinued 39.7 mm 14 mm 47 mm 1861
Speedmaster '57 Chronograph 41.5 mm 331.10.42.51.01.001Discontinued 41.5 mm 16.17 mm 50 mm 9300
Speedmaster Anniversary Series 42 mm (calibre 1861) 311.32.42.30.01.001Discontinued 42 mm 14 mm 48 mm 1861
Speedmaster Dark Side Of The Moon Chronograph 44.25 mm 311.92.44.51.01.003Discontinued 44.25 mm 16.14 mm 49.8 mm 9300
Speedmaster Date 40 mm 3210.50.00Discontinued 40 mm 15.2 mm 45.6 mm 1164
Speedmaster Mark II Chronograph 42.4 × 46.2 mm 327.10.43.50.01.001Discontinued 42.4 mm 14.85 mm 46.2 mm 3330
Speedmaster Moonwatch Chronograph 42 mm 311.30.42.30.01.004Discontinued 42 mm 13.8 mm 48.2 mm 1861
Speedmaster Moonwatch Professional Chronograph 42 mm (calibre 1861) 311.30.42.30.01.005Discontinued 42 mm 13.8 mm 48.2 mm 1861
Speedmaster Moonwatch Professional Chronograph 42 mm (calibre 1863) 311.30.42.30.01.006Discontinued 42 mm 13.45 mm 48.2 mm 1863
Speedmaster Racing Chronograph 40 mm 326.30.40.50.01.001Discontinued 40 mm 15.05 mm 46 mm 3330

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