Seiko Cal. 6634 - 163

Seiko 6634-163

The 6634-163 is a sought-after Automatic piece from Seiko's golden era. Powered by the 6634 caliber with 29j jewels beating at 21,600 bph, it delivers a 50 hours power reserve. [seikata-wm-91ee62f49550]

Also known as: Monster, Baby Tuna

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
46mm
Case Thickness
8.0mm
Lug Width
22mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
130m
Dial Color
Blue Sunburst
Jewels
29j
Frequency
21,600 bph
Power Reserve
50 hours
Year
1976

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