Seiko Cal. 3855 - 603

This Spring Drive model from 1973 features a 42mm Two-Tone case. Powered by the 3855 caliber with 18j jewels beating at 36,000 bph, it delivers a 52 hours power reserve. [seikata-wm-cfa0e7b4996c]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

18j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1973

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