Seiko Cal. 5613 - 901

This Spring Drive model from 1990 features a 37mm Hardlex-Coated Steel case. Powered by the 5613 caliber with 22j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-58cbf1c7a4de]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1990

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