Seiko Cal. 6637 - 548

Seiko 6637-548

The 6637-548 is a sought-after Spring Drive piece from Seiko's golden era. With its 18mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-e80c01cc90d6]

Also known as: UFO, Golden Tuna

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
43mm
Case Thickness
15.5mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
120m
Dial Color
Navy
Jewels
22j
Frequency
28,800 bph
Power Reserve
53 hours
Year
1992

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