Seiko Cal. 6640 - 794

This Hand-Winding model from 1970 features a 45mm Gold-Plated case. With its 18mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-83b1ad310249]

Also known as: Bellmatic

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

13.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Cream

Jewels

25j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1970

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