Seiko Cal. 6637 - 732

The 6637-732 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6637 caliber with 27j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-bf903799edea]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

42mm

Case Thickness

9.0mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

120m

Dial Color

White

Jewels

27j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1996

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