Seiko Cal. 5657 - 620

Seiko 5657-620

The Seiko 5657-620 represents an important milestone in Seiko's 1976 lineup. Powered by the 5657 caliber with 18j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-2178cb171222]

Also known as: Baby Tuna

Specifications

Movement
Hand-Winding
Case Material
Gold-Plated
Case Width
41mm
Case Thickness
9.0mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
110m
Dial Color
Cream
Jewels
18j
Frequency
21,600 bph
Power Reserve
68 hours
Year
1976

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seikata-wm-2178cb171222