Seiko Cal. 6638 - 630

The 6638-630 is a sought-after Hand-Winding piece from Seiko's golden era. It features a White dial protected by a Mineral crystal and offers 110m of water resistance. [seikata-wm-35e7f5f59980]

Also known as: UFO, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

8.9mm

Lug Width

22mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

110m

Dial Color

White

Jewels

24j

Frequency

36,000 bph

Power Reserve

64 hours

Year

1984

Related Models

• Seiko 7052-796
• Seiko 6341-866
• Seiko 3867-493
• Seiko 5226-395
• Seiko 5236-657
• Seiko 6612-639
• Seiko 0783-326
• Seiko 3843-527
• Seiko 6150-976
• Seiko 6337-822
• Seiko 6157-101
• Seiko 4544-425