Seiko Cal. 6657 - 672

This Spring Drive model from 1972 features a 38mm PVD Black case. Powered by the 6657 caliber with 24j jewels beating at 28,800 bph, it delivers a 44 hours power reserve. [seikata-wm-1aa2972d9137]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1972

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