Seiko Cal. 4521 - 349

This Spring Drive model from 1970 features a 45mm Stainless Steel case. Powered by the 4521 caliber with 36j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-90e158155613]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

60m

Dial Color

Silver

Jewels

36j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1970

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