Seiko Cal. 7131 - 338

The 7131-338 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7131 caliber with 18j jewels beating at 21,600 bph, it delivers a 62 hours power reserve. [seikata-wm-5a8ac784e9b4]

Also known as: Tuna, Pogue

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

10.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

18j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1975

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