Seiko Cal. 6390 - 261

This Spring Drive model from 1990 features a 45mm Stainless Steel case. Powered by the 6390 caliber with 18j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-355f25853501]

Also known as: Sumo, World Timer

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

White

Jewels

18j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1990

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