Seiko Cal. 6640 - 745

This Quartz model from 1977 features a 45mm Stainless Steel case. Powered by the 6640 caliber with 33j jewels beating at 28,800 bph, it delivers a 61 hours power reserve. [seikata-wm-0902964f2b64]

Also known as: Emperor

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

14.2mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Black

Jewels

33j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1977

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