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Junghans · FORM A

Junghans FORM A Chronoscope

Reference 27/4370.00 · Chronograph · 42 mm

Ø 42 mm
Illustration drawn from the specifications: case to scale, colours and style approximate. Not a photo. Photos on the official page

Specifications

Reference
27/4370.00
Family
FORM A
Category
Chronograph
Status
Current
Case material
Stainless steel
Case diameter
42 mm
Case thickness
13.5 mm Official
Lug-to-lug
—
Lug width
—
Water resistance
50 m
Bezel
—
Calibre
J880.1 Official

Official product page · retrieved October 19, 2026

Does it fit your wrist?

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

No lug-to-lug dataFlat top of the wrist 54.1 mm
Top view on a wrist, to scale
Flat top of the wrist 54.1 mmNo lug-to-lug dataCase diameter 42 mm
Side view, across the wrist

No lug-to-lug figure exists for this reference yet, so fit cannot be computed.

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
13.5 mm Official Junghans Published as the case height. October 19, 2026

Lug-to-lug

No source gave this figure yet.

Lug width

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

No source gave this figure yet.

Calibre source

Official Junghans · retrieved October 19, 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.

  • 27/4370.02 · matt black bowl-shaped concavity dial, leather strap
  • 27/4371.00 · matt black dial, leather strap
  • 27/4371.02 · matt black bowl-shaped concavity dial, leather strap
  • 27/4372.00 · matt black dial, leather strap
  • 27/4372.02 · matt black bowl-shaped concavity dial, leather strap
  • 27/4473.00 · matt black bowl-shaped concavity dial, leather strap
  • 27/4473.02 · matt black bowl-shaped concavity dial, leather strap
  • 27/4370.01 · matt black dial, English weekday, leather strap
  • 27/4370.03 · matt black bowl-shaped concavity dial, English weekday, leather strap
  • 27/4371.01 · matt black dial, English weekday, leather strap
  • 27/4372.01 · matt black dial, English weekday, leather strap
  • 27/4372.03 · matt black bowl-shaped concavity dial, English weekday, leather strap
  • 27/4473.03 · matt black bowl-shaped concavity dial, English weekday, leather strap

Other FORM A references

Watch Ø Thickness Lug-to-lug Calibre
FORM A Automatic 27/4239.00 39.3 mm 9.5 mm — J800.2

Other Junghans models

Watch Ø Thickness Lug-to-lug Calibre
1972 Chronoscope Sports Edition 2026 41/4558.00 43.3 mm 11.3 mm — J645.83
Meister Chronoscope (steel) 27/4120.02 40.7 mm 13.9 mm — J880.1
Meister Chronoscope (yellow gold-coloured PVD) 27/7620.02 40.7 mm 13.9 mm — J880.1
Pilot Chronoscope (black PVD) 27/3794.00 43.3 mm 14.4 mm — J880.4
Pilot Chronoscope (steel, calibre J880.3) 27/3492.00 43.3 mm 14.4 mm — J880.3
Pilot Chronoscope (steel, calibre J880.4) 27/3590.00 43.3 mm 14.4 mm — J880.4
Show 48 more
Watch Ø Thickness Lug-to-lug Calibre
FORM C 41/4770.00 40 mm 10.5 mm — J645.85
max bill Chronoscope (steel) 27/4003.46 40 mm 14.4 mm — J880.2
max bill Chronoscope (yellow gold-coloured PVD) 27/7800.02 40 mm 14.4 mm — J880.2
max bill Chronoscope Bauhaus 27/4409.02 40 mm 14.4 mm — J880.2
Meister fein Chronoscope MEGA Solar (rose gold-coloured PVD) 59/7201.00 39.5 mm 9.5 mm — J110
Meister fein Chronoscope MEGA Solar (steel) 59/4200.00 39.5 mm 9.5 mm — J110
Meister S Chronoscope 27/4023.44 45 mm 15.9 mm — J880.1
Pilot Automatic (black PVD) 27/4491.00 43.3 mm 12.5 mm — J800.1
Pilot Automatic (steel, calibre J800.1) 27/4495.00 43.3 mm 12.5 mm — J800.1
Pilot Automatic (steel, calibre J840.1) 27/4490.00 43.3 mm 12.5 mm — J840.1
Force Mega Solar 18/1000.00 40.4 mm 8.2 mm — J615.84
Meister Worldtimer (rose gold-coloured PVD) 27/5012.01 40.4 mm 10.5 mm — J820.5
Meister Worldtimer (steel) 27/3010.01 40.4 mm 10.5 mm — J820.5
1972 Mega Solar 56/4210.00 43.3 mm 10 mm — J615.84
Meister Automatic (40.4 mm) 27/4416.02 40.4 mm 10.9 mm — J800.1
Aquaris Diver 27/4267.44 46.9 mm 14.5 mm — J830
max bill Regulator 27/4492.46 40 mm 10.9 mm — J800.5
FORM Quarz (39.9 mm) 41/4481.00 39.9 mm 7 mm — J645.37
Meister fein Automatic (rose gold-coloured PVD) 27/7150.00 39.5 mm 10.3 mm — J800.1
Meister fein Automatic (steel) 27/4152.00 39.5 mm 10.3 mm — J800.1
Meister fein Automatic Signatur 27/4355.00 39.5 mm 11 mm — J800.1
FORM Quarz (39.3 mm) 41/4884.00 39.3 mm 7.1 mm — J645.37
FORM Quarz Bauhaus Edition 41/4580.44 39.3 mm 7 mm — J645.37
Milano Mega Solar 56/4220.00 39.2 mm 8.4 mm — J615.84
Meister Automatic (38.4 mm) 27/4243.02 38.4 mm 9.9 mm — J800.1
Meister MEGA 58/4503.46 38.4 mm 9.2 mm — J101.65
Stratos Mega Solar 18/1111.00 39 mm 10.4 mm — J615.82
max bill Automatic (steel) 27/3400.02 38 mm 10 mm — J800.1
max bill Automatic (yellow gold-coloured PVD) 27/7002.02 38 mm 10 mm — J800.1
max bill Automatic Bauhaus 27/4308.02 38 mm 10 mm — J800.1
max bill Automatic Edition 60 27/4108.02 38 mm 10 mm — J800.1
max bill MEGA Kleine Sekunde Edition 60 58/4100.02 38 mm 9 mm — J101.66
max bill MEGA Solar (steel) 59/4325.02 38 mm 9 mm — J101.85
max bill Quarz (black PVD) 41/4660.46 38 mm 7.9 mm — J645.33
max bill Quarz (steel) 41/4461.02 38 mm 7.9 mm — J645.33
max bill Quarz (yellow gold-coloured PVD) 41/7872.02 38 mm 7.9 mm — J645.33
max bill Regulator Edition 60 27/3190.02 38 mm 10.5 mm — J800.5
Meister MEGA Solar 59/4603.02 38 mm 9 mm — J101.85
Meister Handaufzug 27/3200.02 37.7 mm 7.3 mm — J815.1
max bill MEGA Solar (titanium) 59/2020.02 38 mm 9 mm — J101.85
Milano Solar 14/4061.44 37 mm 7.5 mm — J622.10
FORM Damen 47/4055.00 34.1 mm 7 mm — J645.36
max bill Damen 47/4250.46 32.7 mm 6.9 mm — J643.29
max bill Handaufzug (steel) 27/3004.46 34 mm 9 mm — J805.1
max bill Handaufzug (yellow gold-coloured PVD) 27/5703.02 34 mm 9 mm — J805.1
max bill Kleine Automatic 27/4006.02 34 mm 10 mm — J800.1
Meister Damen Automatic 27/3242.00 33.1 mm 9.8 mm — J840.1
Meister fein Kleine Automatic 27/4230.00 35 mm 10.1 mm — J800.1

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