Seiko Cal. 0790 - 687

The 0790-687 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 0790 caliber with 33j jewels beating at 21,600 bph, it delivers a 70 hours power reserve. [seikata-wm-d4a946af0dd6]

Also known as: Sumo, Silverwave

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

33j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1979

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