Seiko Cal. 4521 - 859

This Spring Drive model from 1967 features a 36mm PVD Black case. Powered by the 4521 caliber with 23j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-ff405d6c91bc]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.2mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1967

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