Seiko Cal. 5613 - 481

The Seiko 5613-481 represents an important milestone in Seiko's 1978 lineup. Powered by the 5613 caliber with 30j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-470f90344e1c]

Also known as: Bullhead, Crown

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

30j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1978

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