Seiko Cal. 6643 - 649

Seiko 6643-649

This Automatic model from 1976 features a 45mm Two-Tone case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 160m of water resistance. [seikata-wm-2dfefb45e834]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
45mm
Case Thickness
13.3mm
Lug Width
19mm
Crystal
Mineral
Bezel
Bidirectional
Water Resistance
160m
Dial Color
Blue Sunburst
Jewels
25j
Frequency
21,600 bph
Power Reserve
67 hours
Year
1976

Related Models

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