Seiko Cal. 6634 - 437

Seiko 6634-437

The 6634-437 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 6634 caliber with 30j jewels beating at 28,800 bph, it delivers a 72 hours power reserve. [seikata-wm-c9ae01d432be]

Also known as: Monster

Specifications

Movement
Hand-Winding
Case Material
PVD Black
Case Width
38mm
Case Thickness
9.3mm
Lug Width
19mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
190m
Dial Color
Burgundy
Jewels
30j
Frequency
28,800 bph
Power Reserve
72 hours
Year
1982

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