Seiko Cal. 6643 - 360

Seiko 6643-360

This Spring Drive model from 1980 features a 43mm Hardlex-Coated Steel case. With its 19mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-8740b03c6694]

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
43mm
Case Thickness
15.5mm
Lug Width
19mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
30m
Dial Color
White
Jewels
26j
Frequency
28,800 bph
Power Reserve
51 hours
Year
1980

Related Models

seikata-wm-8740b03c6694