Seiko Cal. 3891 - 644

Seiko 3891-644

This Automatic model from 1980 features a 43mm Titanium case. With its 21mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-c58566b0be4a]

Also known as: Sumo, World Timer

Specifications

Movement
Automatic
Case Material
Titanium
Case Width
43mm
Case Thickness
15.4mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
60m
Dial Color
Navy
Jewels
18j
Frequency
21,600 bph
Power Reserve
72 hours
Year
1980

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seikata-wm-c58566b0be4a