Seiko Cal. 6671 - 640

Seiko 6671-640

The 6671-640 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6671 caliber with 25j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-6549eede4a9a]

Also known as: Sumo, UFO

Specifications

Movement
Quartz
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
10.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
190m
Dial Color
Champagne
Jewels
25j
Frequency
28,800 bph
Power Reserve
46 hours
Year
1978

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seikata-wm-6549eede4a9a