Seiko Cal. 6638 - 971

Seiko 6638-971

The 6638-971 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6638 caliber with 22j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-86d29c1a4865]

Also known as: Monster, Arnie

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
42mm
Case Thickness
14.9mm
Lug Width
22mm
Crystal
Hardlex
Bezel
Fixed
Water Resistance
70m
Dial Color
White
Jewels
22j
Frequency
36,000 bph
Power Reserve
60 hours
Year
1967

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