Seiko Cal. 6131 - 240

The 6131-240 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6131 caliber with 26j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-a86138643798]

Also known as: Bullhead, Emperor

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

120m

Dial Color

Cream

Jewels

26j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1991

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