Seiko Cal. 5660 - 646

The 5660-646 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 5660 caliber with 36j jewels beating at 21,600 bph, it delivers a 49 hours power reserve. [seikata-wm-f597c1fc7c3d]

Also known as: Rally, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

9.7mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

49 hours

Year

1997

Related Models

• Seiko 0792-121
• Seiko 7127-902
• Seiko 4532-556
• Seiko 4549-572
• Seiko 3872-418
• Seiko 6240-366
• Seiko 3848-670
• Seiko 6337-703
• Seiko 4458-459
• Seiko 3875-895
• Seiko 6114-330
• Seiko 0726-137