Seiko Cal. 4521 - 261

This Hand-Winding model from 1988 features a 34mm Hardlex-Coated Steel case. Powered by the 4521 caliber with 23j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-21f6a715b689]

Also known as: Tuna, Rally

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1988

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