Seiko Cal. 6643 - 381

This Quartz model from 1979 features a 34mm Stainless Steel case. Powered by the 6643 caliber with 23j jewels beating at 21,600 bph, it delivers a 48 hours power reserve. [seikata-wm-c788e84e72f8]

Also known as: UFO

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

13.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1979

Related Models

• Seiko 0796-471
• Seiko 7033-843
• Seiko 6372-821
• Seiko 7165-284
• Seiko 6185-317
• Seiko 3888-693
• Seiko 0742-115
• Seiko 6383-694
• Seiko 4440-737
• Seiko 6181-711
• Seiko 4485-187
• Seiko 0740-917