Seiko Cal. 6648 - 638

Seiko 6648-638

The 6648-638 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6648 caliber with 18j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-679f60744132]

Also known as: Helmet

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
36mm
Case Thickness
8.3mm
Lug Width
21mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Champagne
Jewels
18j
Frequency
36,000 bph
Power Reserve
54 hours
Year
1994

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seikata-wm-679f60744132