Seiko Cal. 6621 - 902

This Spring Drive model from 1972 features a 43mm Stainless Steel case. Powered by the 6621 caliber with 17j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-07795deffbb0]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Black

Jewels

17j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1972

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