Seiko Cal. 6662 - 638

Seiko 6662-638

The 6662-638 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6662 caliber with 18j jewels beating at 36,000 bph, it delivers a 64 hours power reserve. [seikata-wm-4747158557c1]

Also known as: Bellmatic, Baby Tuna

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
13.8mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
90m
Dial Color
Green
Jewels
18j
Frequency
36,000 bph
Power Reserve
64 hours
Year
1988

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seikata-wm-4747158557c1