Seiko Cal. 6643 - 730

Seiko 6643-730

This Automatic model from 1993 features a 36mm Two-Tone case. With its 18mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-9591cb48a64d]

Also known as: Monster, Bullhead

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
36mm
Case Thickness
13.1mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Coin-Edge
Water Resistance
190m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1993

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