Seiko Cal. 5637 - 255

Seiko 5637-255

The 5637-255 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5637 caliber with 30j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-8398476c515e]

Also known as: Silverwave, Sportsmatic

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
40mm
Case Thickness
9.6mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
Navy
Jewels
30j
Frequency
21,600 bph
Power Reserve
45 hours
Year
1974

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seikata-wm-8398476c515e