Seiko Cal. 4528 - 881

This Automatic model from 1970 features a 37mm Hardlex-Coated Steel case. Powered by the 4528 caliber with 18j jewels beating at 21,600 bph, it delivers a 54 hours power reserve. [seikata-wm-5fa938847060]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

10.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1970

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