Seiko Cal. 3891 - 321

This Quartz model from 1971 features a 43mm Two-Tone case. Powered by the 3891 caliber with 19j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-75466aab6a3d]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1971

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