Seiko Cal. 5657 - 492

Seiko 5657-492

The Seiko 5657-492 represents an important milestone in Seiko's 1970 lineup. Powered by the 5657 caliber with 24j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-7b07e810d342]

Also known as: Sumo, Sportsmatic

Specifications

Movement
Automatic
Case Material
Gold-Plated
Case Width
34mm
Case Thickness
13.0mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
Blue Sunburst
Jewels
24j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1970

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seikata-wm-7b07e810d342