Seiko Cal. 3890 - 712

The Seiko 3890-712 represents an important milestone in Seiko's 1971 lineup. Powered by the 3890 caliber with 18j jewels beating at 28,800 bph, it delivers a 41 hours power reserve. [seikata-wm-ed43ea96fc67]

Also known as: World Timer, Flighty

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Navy

Jewels

18j

Frequency

28,800 bph

Power Reserve

41 hours

Year

1971

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