Seiko Cal. 6638 - 461

Seiko 6638-461

The 6638-461 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 6638 caliber with 17j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-bcf6b7473c6c]

Also known as: Bellmatic

Specifications

Movement
Kinetic
Case Material
Hardlex-Coated Steel
Case Width
37mm
Case Thickness
8.5mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
110m
Dial Color
Black
Jewels
17j
Frequency
36,000 bph
Power Reserve
66 hours
Year
1976

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