Seiko Cal. 5640 - 966

This Solar model from 1975 features a 37mm Gold-Plated case. With its 19mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-543d1966dd17]

Also known as: Crown

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

19j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1975

Related Models

• Seiko 7059-407
• Seiko 6273-280
• Seiko 7051-105
• Seiko 5213-365
• Seiko 3856-232
• Seiko 4499-728
• Seiko 6317-457
• Seiko 6180-902
• Seiko 6122-263
• Seiko 6345-641
• Seiko 0725-850
• Seiko 6229-467