Seiko Cal. 5657 - 491

Seiko 5657-491

The Seiko 5657-491 represents an important milestone in Seiko's 1970 lineup. Powered by the 5657 caliber with 35j jewels beating at 36,000 bph, it delivers a 49 hours power reserve. [seikata-wm-8f5f3e4005e3]

Also known as: Sportsmatic, Arnie

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
10.4mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Champagne
Jewels
35j
Frequency
36,000 bph
Power Reserve
49 hours
Year
1970

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