Seiko Cal. 6641 - 577

Seiko 6641-577

This Spring Drive model from 1979 features a 44mm Titanium case. Powered by the 6641 caliber with 34j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-5e5f80a79ea3]

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
44mm
Case Thickness
13.9mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
120m
Dial Color
White
Jewels
34j
Frequency
21,600 bph
Power Reserve
52 hours
Year
1979

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