Seiko Cal. 5670 - 731

Seiko 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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