Seiko Cal. 5646 - 603

Seiko 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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