Seiko Cal. 5621 - 654

The Seiko 5621-654 represents an important milestone in Seiko's 1980 lineup. Powered by the 5621 caliber with 20j jewels beating at 28,800 bph, it delivers a 57 hours power reserve. [seikata-wm-9a1fe438b25f]

Also known as: Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

Burgundy

Jewels

20j

Frequency

28,800 bph

Power Reserve

57 hours

Year

1980

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