Seiko Cal. 7137 - 491

The 7137-491 is a sought-after Automatic piece from Seiko's golden era. Powered by the 7137 caliber with 29j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-2fc3e0eceed4]

Also known as: Tuna, Sportsmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

160m

Dial Color

Navy

Jewels

29j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1988

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