Seiko Cal. 7131 - 844

The 7131-844 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 7131 caliber with 24j jewels beating at 28,800 bph, it delivers a 36 hours power reserve. [seikata-wm-c0c3129e375c]

Also known as: Bullhead, UFO

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

42mm

Case Thickness

10.7mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1971

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