Seiko Cal. 6131 - 490

Released in 1966, the Cal. 6131 with design code 490 was part of Seiko's domestic market collection. Powered by the 6131 caliber with 22j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-d8c9df01fb49]

Also known as: Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Green

Jewels

22j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1966

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