Seiko Cal. 6646 - 387

This Hand-Winding model from 1973 features a 42mm Gold-Plated case. Powered by the 6646 caliber with 20j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-55e47c1bce7f]

Also known as: Bellmatic, Navigator

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1973

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