Seiko Cal. 6637 - 303

Seiko 6637-303

The 6637-303 is a sought-after Automatic piece from Seiko's golden era. With its 18mm lug width and 11.8mm profile, it sits comfortably on most wrists. [seikata-wm-dcf496041ea5]

Also known as: Samurai, UFO

Specifications

Movement
Automatic
Case Material
PVD Black
Case Width
40mm
Case Thickness
11.8mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Coin-Edge
Water Resistance
190m
Dial Color
Champagne
Jewels
34j
Frequency
28,800 bph
Power Reserve
39 hours
Year
1991

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