Seiko Cal. 6644 - 856

Seiko 6644-856

This Spring Drive model from 1985 features a 36mm Stainless Steel case. With its 19mm lug width and 14.7mm profile, it sits comfortably on most wrists. [seikata-wm-8acdb757ed7c]

Also known as: Helmet, Arnie

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
36mm
Case Thickness
14.7mm
Lug Width
19mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
90m
Dial Color
Navy
Jewels
34j
Frequency
36,000 bph
Power Reserve
48 hours
Year
1985

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