Seiko Cal. 3816 - 631

This Hand-Winding model from 1975 features a 44mm Two-Tone case. Powered by the 3816 caliber with 34j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-0e9718119554]

Also known as: Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Silver

Jewels

34j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1975

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