Seiko Cal. 6665 - 398

This Spring Drive model from 1977 features a 40mm Hardlex-Coated Steel case. Powered by the 6665 caliber with 36j jewels beating at 36,000 bph, it delivers a 63 hours power reserve. [seikata-wm-e98ed3808c2e]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Navy

Jewels

36j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1977

Related Models

• Seiko 5217-725
• Seiko 6243-265
• Seiko 4457-334
• Seiko 7158-781
• Seiko 6187-623
• Seiko 7192-940
• Seiko 3892-274
• Seiko 7165-104
• Seiko 5244-784
• Seiko 3844-485
• Seiko 6155-453
• Seiko 5662-159