Seiko Cal. 6641 - 310

Seiko 6641-310

This Spring Drive model from 1976 features a 45mm Titanium case. With its 22mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-2e415635e12e]

Also known as: Turtle, Sea Horse

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
45mm
Case Thickness
9.5mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Champagne
Jewels
23j
Frequency
36,000 bph
Power Reserve
43 hours
Year
1976

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