Seiko Cal. 6645 - 428

The Seiko 6645-428 represents an important milestone in Seiko's 1979 lineup. Powered by the 6645 caliber with 18j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-ca29a19a36f6]

Also known as: Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

12.2mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

18j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1979

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