Seiko Cal. 5645 - 673

The Seiko 5645-673 represents an important milestone in Seiko's 1995 lineup. Powered by the 5645 caliber with 21j jewels beating at 36,000 bph, it delivers a 59 hours power reserve. [seikata-wm-3fef847dd1c6]

Also known as: Sumo, World Timer

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

46mm

Case Thickness

10.0mm

Lug Width

20mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1995

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