Seiko Cal. 5646 - 603

The Seiko 5646-603 represents an important milestone in Seiko's 1976 lineup. Powered by the 5646 caliber with 23j jewels beating at 36,000 bph, it delivers a 56 hours power reserve. [seikata-wm-136ec94d8ea2]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

60m

Dial Color

Navy

Jewels

23j

Frequency

36,000 bph

Power Reserve

56 hours

Year

1976

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