Seiko Cal. 7140 - 937

The 7140-937 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7140 caliber with 29j jewels beating at 21,600 bph, it delivers a 43 hours power reserve. [seikata-wm-1ecb86c324df]

Also known as: Rally, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

39mm

Case Thickness

10.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Silver

Jewels

29j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1980

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