Seiko Cal. 6636 - 331

Seiko 6636-331

The 6636-331 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6636 caliber with 17j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-48b804a95ebb]

Also known as: Bellmatic, Golden Tuna

Specifications

Movement
Quartz
Case Material
PVD Black
Case Width
42mm
Case Thickness
8.4mm
Lug Width
19mm
Crystal
Mineral
Bezel
Coin-Edge
Water Resistance
160m
Dial Color
Champagne
Jewels
17j
Frequency
28,800 bph
Power Reserve
38 hours
Year
1981

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