Seiko Cal. 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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