Seiko Cal. 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

Related Models

• Seiko 6149-290
• Seiko 3862-544
• Seiko 3866-517
• Seiko 4492-107
• Seiko 5260-914
• Seiko 7043-441
• Seiko 6264-344
• Seiko 7012-111
• Seiko 6357-440
• Seiko 6189-363
• Seiko 6646-685
• Seiko 6121-278