Seiko Cal. 6636 - 885

Seiko 6636-885

The 6636-885 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6636 caliber with 30j jewels beating at 36,000 bph, it delivers a 62 hours power reserve. [seikata-wm-3dec1ada7f1e]

Also known as: Bellmatic, Emperor

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
46mm
Case Thickness
9.9mm
Lug Width
22mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
200m
Dial Color
Navy
Jewels
30j
Frequency
36,000 bph
Power Reserve
62 hours
Year
1978

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