Seiko Cal. 5640 - 667

Seiko 5640-667

The 5640-667 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5640 caliber with 32j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-0f92a870e33e]

Also known as: Bullhead, Bellmatic

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
42mm
Case Thickness
14.0mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Fixed
Water Resistance
120m
Dial Color
Green
Jewels
32j
Frequency
36,000 bph
Power Reserve
69 hours
Year
1980

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