Seiko Cal. 6639 - 518

This Hand-Winding model from 1970 features a 38mm Stainless Steel case. Powered by the 6639 caliber with 21j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-33f0d4cd69aa]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

11.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

150m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1970

Related Models

• Seiko 3859-802
• Seiko 4448-227
• Seiko 6262-156
• Seiko 5241-743
• Seiko 7191-195
• Seiko 7048-781
• Seiko 4581-738
• Seiko 6647-688
• Seiko 5217-979
• Seiko 5611-124
• Seiko 6365-661
• Seiko 6175-678