Seiko Cal. 6638 - 675

The Seiko 6638-675 represents an important milestone in Seiko's 1980 lineup. It features a Blue Sunburst dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-3d589dab7950]

Also known as: UFO, Flighty

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

40mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1980

Related Models

• Seiko 6123-189
• Seiko 7094-944
• Seiko 3820-908
• Seiko 5699-441
• Seiko 7183-749
• Seiko 6643-717
• Seiko 6664-207
• Seiko 6135-735
• Seiko 4424-886
• Seiko 5234-780
• Seiko 6235-609
• Seiko 6397-266