Seiko Cal. 6665 - 646

This Solar model from 1978 features a 37mm Titanium case. Powered by the 6665 caliber with 35j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-181b9fbddf14]

Also known as: Silverwave, Baby Tuna

Specifications

Movement

Solar

Case Material

Titanium

Case Width

37mm

Case Thickness

15.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

150m

Dial Color

Navy

Jewels

35j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1978

Related Models

• Seiko 7056-476
• Seiko 6311-715
• Seiko 5274-479
• Seiko 0763-493
• Seiko 6659-633
• Seiko 4475-732
• Seiko 6628-985
• Seiko 7036-125
• Seiko 6129-428
• Seiko 5232-955
• Seiko 6173-316
• Seiko 4560-339