Seiko Cal. 6643 - 358

Seiko 6643-358

This Quartz model from 1990 features a 38mm Titanium case. The Rotating bezel and 38mm case give it a distinctive presence on the wrist. [seikata-wm-778a0a5e5f4b]

Also known as: Bullhead, Sportsmatic

Specifications

Movement
Quartz
Case Material
Titanium
Case Width
38mm
Case Thickness
9.0mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Rotating
Water Resistance
150m
Dial Color
Black
Jewels
20j
Frequency
36,000 bph
Power Reserve
49 hours
Year
1990

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