Seiko Cal. 6640 - 587

This Hand-Winding model from 1989 features a 45mm Gold-Plated case. Powered by the 6640 caliber with 33j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-ba3feab66c69]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1989

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