Seiko Cal. 6643 - 755

Seiko 6643-755

This Automatic model from 1971 features a 39mm Stainless Steel case. With its 18mm lug width and 13.7mm profile, it sits comfortably on most wrists. [seikata-wm-4ef4e38b2039]

Also known as: Helmet

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
13.7mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
190m
Dial Color
Navy
Jewels
36j
Frequency
21,600 bph
Power Reserve
49 hours
Year
1971

Related Models

seikata-wm-4ef4e38b2039