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Bremont · Terra Nova

Bremont Terra Nova Jumping Hour 40.5 mm

Reference tn40-jh-ss-bk-b · Tool · 40.5 mm

121234567891011Ø 40.5 mmLug-to-lug 47 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
tn40-jh-ss-bk-b
Family
Terra Nova
Category
Tool
Status
Current
Case material
Stainless steel
Case diameter
40.5 mm
Case thickness
10.15 mm Official
Lug-to-lug
47 mm Official
Lug width
22 mm Official
Water resistance
100 m
Bezel
—
Calibre
BC634AH Official
Power reserve
56 h
Frequency
28 vph (0 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.

121234567891011Lug-to-lug 47 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 47 mmCase diameter 40.5 mm
Side view, across the wrist

Comfortable

Lug-to-lug 47 mm on a flat top of 54.1 mm: 87 % of the width.

Lug-to-lug is 75 to 95% of the flat top, the usual comfortable range.

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
10.15 mm Official Bremont Published as the case depth. October 20, 2026

Lug-to-lug

Value Type Source Date
47 mm Official Bremont Published as the case length. 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
22 mm Official Bremont October 20, 2026

Calibre source

Official Bremont · retrieved October 20, 2026

Other versions in the same case

These references differ only by dial, bracelet or bezel colour. The brand gives them the same case dimensions, so the figures on this page apply to them too.

Other Terra Nova references

Watch Ø Thickness Lug-to-lug Calibre
HMAF Terra Nova 40.5 mm Date hmaf-terra-nova-40-5mm-date-bracelet 40.5 mm 11.11 mm 47 mm BB54AH
Terra Nova 40.5 mm Date tn40-dt-ss-bk-b 40.5 mm 11.11 mm 47 mm BE-36AE
Terra Nova 40.5 mm Turning Bezel Power Reserve tn40-pwr-ss-bk-b 40.5 mm 11.91 mm 47 mm BE-79AL
Limited Edition Terra Nova 40.5 mm Power Reserve Bronze tn40-pwr-bz-br-b 40.5 mm 11.91 mm 47 mm BE-79AL
Terra Nova 40.5 mm Date Bronze tn40-dt-bz-gn-b 40.5 mm 11.11 mm 47 mm BE-36AE
Terra Nova 38 mm tn38-nd-ss-bk-b 38 mm 10.7 mm 44 mm BE-36AL
Terra Nova Jumping Hour 38 mm tn38-jh-ss-cc-b 38 mm 9.1 mm 44 mm BC634AH
Terra Nova 35 mm Jumping Hour terra-nova-35mm-jumping-hour-burgundy-leather-strap 35 mm 10.3 mm 40.93 mm BC634AH
Terra Nova Jumping Hour 35 mm (8.9 mm high) terra-nova-35mm-jumping-hour-leather-strap 35 mm 8.9 mm 40.93 mm BC634AH
Terra Nova 42.5 mm Chronograph tn42-chr-ss-bk-b 42.5 mm 14.8 mm 48.8 mm BE-50AV
Terra Nova 42.5 mm HRR Chronograph terra-nova-42-5mm-hrr-chronograph-bracelet-watch 42.5 mm 14.8 mm 48.8 mm BC77AC
Terra Nova 42.5 mm Chronograph Bronze tn42-chr-bz-gn-b 42.5 mm 14.8 mm 48.8 mm BE-50AV

Other Bremont models

Watch Ø Thickness Lug-to-lug Calibre
Supernova Tourbillon 41 mm supernova-41mm-tourbillon 41 mm 10.72 mm 48.7 mm BHC91180MH
Altitude 39 mm altitude-39mm-blue-dial-bracelet 39 mm 11.19 mm 47.17 mm BB14AH
Altitude MB Meteor 42 mm alt42-mt-ti-bkbk-b 42 mm 12.23 mm 49.3 mm BB14AH
HMAF Supermarine 40 mm Date hmaf-supermarine-40mm-date-leather-strap 40 mm 12 mm 49 mm BB64AH
Supermarine 300M 40 mm sm40-nd-ss-bl-b 40 mm 12 mm 49 mm BE-92AO
Supermarine 300M Date 40 mm sm40-dt-ss-bk-b 40 mm 12 mm 49 mm BE-92AV
Show 10 more
Watch Ø Thickness Lug-to-lug Calibre
Supermarine 300M GMT 40 mm sm40-gmt-ss-blbk-b 40 mm 13 mm 48 mm BE-93-2AV
Supermarine 300M Date Bi-Colour 40 mm sm40-dt-bi-br-b 40 mm 12 mm 49 mm BE-92AV
Supernova Chronograph 41 mm supernova-41mm-chronograph-bracelet 41 mm 14.4 mm 48.7 mm BC77AC
Altitude MB Meteor Time Zones 42 mm altitude-mb-meteor-time-zones-air-force-blue-dial-bracelet 42 mm 12.23 mm 49.3 mm BB641AH
Altitude Perpetual Calendar GMT 42 mm alt42-per-ti-bl-b 42 mm 12.65 mm 49.62 mm BHC9192MH
Supermarine 500m 43 mm sm43-dt-ss-bk-b 43 mm 13 mm 50 mm BB64AH
Altitude Chronograph GMT 42 mm alt42-chr-g-ss-bk-b 42 mm 14.7 mm 49.62 mm BC781AC
Supermarine Full Ceramic 43 mm supermarine-43mm-full-ceramic-deep-blue-leather-strap-watch 43 mm 13 mm 50 mm BB64AH
Supermarine Full Ceramic Tactical Black 43 mm sm43-dt-bkcer-bk-n-s 43 mm 13 mm 50 mm BE-92AV
Altitude Chronograph Pulsograph Valjoux 23 42 mm altitude-chronograph-pulsograph-valjoux-23 42 mm 12.65 mm 49.62 mm BC99M

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