Seiko Cal. 5643 - 957

Seiko 5643-957

The Seiko 5643-957 represents an important milestone in Seiko's 1970 lineup. Powered by the 5643 caliber with 21j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-4b753d936c3a]

Also known as: Rally

Specifications

Movement
Solar
Case Material
Stainless Steel
Case Width
40mm
Case Thickness
8.9mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Coin-Edge
Water Resistance
140m
Dial Color
Cream
Jewels
21j
Frequency
28,800 bph
Power Reserve
37 hours
Year
1970

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