Seiko Cal. 6645 - 737

The Seiko 6645-737 represents an important milestone in Seiko's 1991 lineup. Powered by the 6645 caliber with 25j jewels beating at 28,800 bph, it delivers a 39 hours power reserve. [seikata-wm-eff072ff3eb3]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

39mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Black

Jewels

25j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1991

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