Seiko Cal. 6664 - 690

This Quartz model from 1968 features a 43mm Hardlex-Coated Steel case. It features a Blue Sunburst dial protected by a Mineral crystal and offers 150m of water resistance. [seikata-wm-f74a649b1876]

Also known as: Bellmatic, Crown

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Blue Sunburst

Jewels

33j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1968

Related Models

• Seiko 4587-137
• Seiko 7141-677
• Seiko 5691-741
• Seiko 0799-472
• Seiko 5234-925
• Seiko 0795-684
• Seiko 4443-398
• Seiko 0787-725
• Seiko 0787-106
• Seiko 6220-738
• Seiko 5216-228
• Seiko 5275-133