Seiko Cal. 6637 - 649

The 6637-649 is a sought-after Automatic piece from Seiko's golden era. It features a Green dial protected by a Acrylic crystal and offers 60m of water resistance. [seikata-wm-e5140b0f3c0e]

Also known as: UFO, Goldfeather

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

60m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1974

Related Models

• Seiko 7132-403
• Seiko 4466-730
• Seiko 6337-592
• Seiko 7148-984
• Seiko 4414-172
• Seiko 6363-930
• Seiko 5288-648
• Seiko 3833-974
• Seiko 6250-105
• Seiko 6161-110
• Seiko 5249-904
• Seiko 5630-660