Seiko Cal. 6648 - 763

Seiko 6648-763

The 6648-763 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6648 caliber with 33j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-fb0cb06bac23]

Also known as: Monster, Baby Tuna

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
45mm
Case Thickness
12.4mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
130m
Dial Color
Black
Jewels
33j
Frequency
21,600 bph
Power Reserve
66 hours
Year
1983

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