Seiko Cal. 6688 - 916

This Solar model from 1977 features a 37mm Hardlex-Coated Steel case. Powered by the 6688 caliber with 18j jewels beating at 21,600 bph, it delivers a 67 hours power reserve. [seikata-wm-1b95df6709a6]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Cream

Jewels

18j

Frequency

21,600 bph

Power Reserve

67 hours

Year

1977

Related Models

• Seiko 4444-952
• Seiko 0778-513
• Seiko 4530-918
• Seiko 6267-817
• Seiko 6347-264
• Seiko 7165-515
• Seiko 0742-473
• Seiko 5659-784
• Seiko 7024-669
• Seiko 7141-199
• Seiko 0780-175
• Seiko 6387-969