Seiko Cal. 3891 - 590

Seiko 3891-590

This Automatic model from 1974 features a 37mm Stainless Steel case. Powered by the 3891 caliber with 20j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-5e1b224116ea]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
14.3mm
Lug Width
20mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
80m
Dial Color
Burgundy
Jewels
20j
Frequency
21,600 bph
Power Reserve
61 hours
Year
1974

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