Seiko Cal. 6643 - 730

Seiko 6643-730

This Automatic model from 1971 features a 37mm Two-Tone case. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-efcacded5757]

Specifications

Movement
Automatic
Case Material
Two-Tone
Case Width
37mm
Case Thickness
12.6mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
190m
Dial Color
Burgundy
Jewels
17j
Frequency
36,000 bph
Power Reserve
63 hours
Year
1971

Related Models

seikata-wm-efcacded5757