Seiko Cal. 3897 - 878

This Hand-Winding model from 1969 features a 34mm Hardlex-Coated Steel case. Powered by the 3897 caliber with 32j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-92cea37ccd48]

Also known as: Sumo, Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

14.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1969

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