Seiko Cal. 6640 - 798

This Hand-Winding model from 1969 features a 36mm Stainless Steel case. With its 22mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-0e8a20e3161f]

Also known as: Rally

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

12.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

120m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1969

Related Models

• Seiko 3863-368
• Seiko 5253-189
• Seiko 7094-321
• Seiko 3846-717
• Seiko 6328-528
• Seiko 6295-560
• Seiko 6265-308
• Seiko 6126-549
• Seiko 6168-892
• Seiko 4531-245
• Seiko 6244-925
• Seiko 4569-523