Seiko Cal. 5631 - 929

This Spring Drive model from 1968 features a 36mm PVD Black case. Powered by the 5631 caliber with 29j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-bea9961c701f]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.3mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Champagne

Jewels

29j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1968

Related Models

• Seiko 7093-340
• Seiko 3824-670
• Seiko 0795-297
• Seiko 6241-888
• Seiko 4423-268
• Seiko 7116-392
• Seiko 0755-284
• Seiko 7179-695
• Seiko 0718-184
• Seiko 0715-686
• Seiko 7023-494
• Seiko 5640-189