Seiko Cal. 4521 - 645

The Seiko 4521-645 represents an important milestone in Seiko's 1984 lineup. Powered by the 4521 caliber with 35j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-d2cf9fcf89dc]

Also known as: Sportsmatic, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

14.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

35j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1984

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