Seiko Cal. 3880 - 931

The 3880-931 is a sought-after Automatic piece from Seiko's golden era. Powered by the 3880 caliber with 22j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-657b96d7f061]

Also known as: Turtle, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

22j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1983

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