Seiko Cal. 6637 - 446

The Seiko 6637-446 represents an important milestone in Seiko's 1988 lineup. With its 22mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-2b636e8b0868]

Also known as: Bellmatic, Emperor

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

13.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

70m

Dial Color

Cream

Jewels

28j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1988

Related Models

• Seiko 4431-570
• Seiko 6281-380
• Seiko 6670-663
• Seiko 6666-847
• Seiko 4473-526
• Seiko 5635-353
• Seiko 6644-120
• Seiko 6120-387
• Seiko 0735-329
• Seiko 3863-652
• Seiko 5281-270
• Seiko 5231-583