Seiko Cal. 5670 - 731

The Seiko 5670-731 represents an important milestone in Seiko's 1975 lineup. Powered by the 5670 caliber with 20j jewels beating at 36,000 bph, it delivers a 46 hours power reserve. [seikata-wm-d7b5a4608d0a]

Also known as: Monster, UFO

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

43mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Black

Jewels

20j

Frequency

36,000 bph

Power Reserve

46 hours

Year

1975

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