Seiko Cal. 5670 - 721

The 5670-721 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5670 caliber with 31j jewels beating at 36,000 bph, it delivers a 55 hours power reserve. [seikata-wm-94a1c306e184]

Also known as: Sportsmatic, Emperor

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

14.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

55 hours

Year

1972

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