Seiko Cal. 4521 - 915

This Spring Drive model from 1975 features a 39mm Titanium case. Powered by the 4521 caliber with 20j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-2b8911002bed]

Also known as: Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

12.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

140m

Dial Color

Silver

Jewels

20j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1975

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