Seiko Cal. 5687 - 634

The 5687-634 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5687 caliber with 31j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-509bc0a73105]

Also known as: Samurai, Navigator

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Silver

Jewels

31j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1970

Related Models

• Seiko 4420-438
• Seiko 0783-810
• Seiko 3865-183
• Seiko 6329-664
• Seiko 3873-699
• Seiko 6240-499
• Seiko 6169-311
• Seiko 6610-303
• Seiko 6261-585
• Seiko 4474-920
• Seiko 4573-796
• Seiko 4456-567