Seiko Cal. 6635 - 764

The Seiko 6635-764 represents an important milestone in Seiko's 1992 lineup. Powered by the 6635 caliber with 23j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-b5d7f79ad2fd]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

23j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1992

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