Seiko Cal. 3899 - 363

This Hand-Winding model from 1968 features a 40mm Two-Tone case. Powered by the 3899 caliber with 28j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-19e9e2d82b86]

Also known as: Sumo

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

60m

Dial Color

Navy

Jewels

28j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1968

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