Seiko Cal. 6646 - 361

This Spring Drive model from 1988 features a 39mm Stainless Steel case. Powered by the 6646 caliber with 18j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-465b6e722a9f]

Also known as: Sumo, Arnie

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

14.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Navy

Jewels

18j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1988

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