Seiko Cal. 6637 - 545

Seiko 6637-545

The 6637-545 is a sought-after Spring Drive piece from Seiko's golden era. With its 20mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-cd766b96d13c]

Also known as: Turtle, Tuna

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
37mm
Case Thickness
12.0mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
100m
Dial Color
Burgundy
Jewels
22j
Frequency
21,600 bph
Power Reserve
55 hours
Year
1971

Related Models

seikata-wm-cd766b96d13c