Seiko Cal. 4538 - 104

This Automatic model from 1979 features a 42mm Stainless Steel case. Powered by the 4538 caliber with 33j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-067084213add]

Also known as: Monster, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

13.4mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

150m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1979

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