Seiko Cal. 5645 - 139

The Seiko 5645-139 represents an important milestone in Seiko's 1992 lineup. Powered by the 5645 caliber with 32j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-7234a4fbf395]

Also known as: Sumo, Bullhead

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

180m

Dial Color

Silver

Jewels

32j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1992

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