Seiko Cal. 7137 - 491

Seiko 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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