Seiko Cal. 4521 - 642

This Hand-Winding model from 1993 features a 37mm Two-Tone case. Powered by the 4521 caliber with 31j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-8dcdbfc4935c]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

37mm

Case Thickness

14.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

31j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1993

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