Seiko Cal. 6390 - 220

This Automatic model from 1971 features a 46mm Hardlex-Coated Steel case. Powered by the 6390 caliber with 23j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-f2bec167bbd3]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

14.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

23j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1971

Related Models

• Seiko 6642-865
• Seiko 6177-307
• Seiko 6696-192
• Seiko 0798-510
• Seiko 6293-310
• Seiko 4579-197
• Seiko 4435-783
• Seiko 7083-130
• Seiko 3897-151
• Seiko 5659-826
• Seiko 5656-571
• Seiko 4481-611