Seiko Cal. 6637 - 883

The 6637-883 is a sought-after Solar piece from Seiko's golden era. With its 22mm lug width and 8.8mm profile, it sits comfortably on most wrists. [seikata-wm-0e9cd4caf1dd]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Solar

Case Material

Titanium

Case Width

34mm

Case Thickness

8.8mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

26j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1973

Related Models

• Seiko 4444-521
• Seiko 6697-792
• Seiko 6227-592
• Seiko 5230-322
• Seiko 6673-503
• Seiko 5699-394
• Seiko 6225-384
• Seiko 6361-418
• Seiko 7147-771
• Seiko 3835-885
• Seiko 0726-544
• Seiko 6112-596