Seiko Cal. 6631 - 338

This Automatic model from 1968 features a 45mm Stainless Steel case. Powered by the 6631 caliber with 23j jewels beating at 28,800 bph, it delivers a 46 hours power reserve. [seikata-wm-f01f89d1296f]

Also known as: Flighty

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

11.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Champagne

Jewels

23j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1968

Related Models

• Seiko 5627-103
• Seiko 6346-833
• Seiko 5676-935
• Seiko 7176-137
• Seiko 4524-479
• Seiko 0774-748
• Seiko 6394-792
• Seiko 5220-667
• Seiko 6284-371
• Seiko 0717-807
• Seiko 6121-425
• Seiko 6653-162