Seiko Cal. 7131 - 631

The 7131-631 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 7131 caliber with 35j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-14e0f6a58f7d]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Burgundy

Jewels

35j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1997

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