Seiko Cal. 6645 - 537

This Quartz model from 1981 features a 42mm PVD Black case. Powered by the 6645 caliber with 30j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-e6f02e7ca8ba]

Also known as: Rally

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

42mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Navy

Jewels

30j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1981

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