Seiko Cal. 6663 - 863

This Spring Drive model from 1968 features a 39mm Two-Tone case. Powered by the 6663 caliber with 23j jewels beating at 36,000 bph, it delivers a 67 hours power reserve. [seikata-wm-4d959a8714bd]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

23j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1968

Related Models

• Seiko 6316-544
• Seiko 6317-466
• Seiko 4592-597
• Seiko 7140-636
• Seiko 6676-961
• Seiko 6161-734
• Seiko 5623-221
• Seiko 5671-422
• Seiko 6124-584
• Seiko 7193-468
• Seiko 4572-362
• Seiko 4486-959