Seiko Cal. 5271 - 831

This Hand-Winding model from 1974 features a 37mm Hardlex-Coated Steel case. Powered by the 5271 caliber with 24j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-3b4cb9c9616b]

Also known as: Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.2mm

Lug Width

21mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

30m

Dial Color

Silver

Jewels

24j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1974

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