Seiko Cal. 3855 - 840

This Automatic model from 1970 features a 40mm Two-Tone case. Powered by the 3855 caliber with 36j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-1b0751622135]

Also known as: Sportsmatic, Flighty

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

40mm

Case Thickness

11.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

140m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1970

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