Seiko Cal. 5688 - 635

This Spring Drive model from 1970 features a 35mm Two-Tone case. Powered by the 5688 caliber with 31j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-66bbd1eefe71]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

10.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

31j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1970

Related Models

• Seiko 4542-707
• Seiko 6399-753
• Seiko 7017-975
• Seiko 4559-985
• Seiko 4478-399
• Seiko 0720-672
• Seiko 6124-800
• Seiko 4590-405
• Seiko 6271-637
• Seiko 6256-331
• Seiko 4560-538
• Seiko 5675-273