Seiko Cal. 6630 - 370

This Automatic model from 1979 features a 38mm Stainless Steel case. Powered by the 6630 caliber with 36j jewels beating at 36,000 bph, it delivers a 53 hours power reserve. [seikata-wm-ce9864cb63a0]

Also known as: Sumo, Bellmatic

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

36,000 bph

Power Reserve

53 hours

Year

1979

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