Seiko Cal. 6640 - 319

This Automatic model from 1975 features a 34mm Stainless Steel case. It features a Green dial protected by a Acrylic crystal and offers 180m of water resistance. [seikata-wm-945cc860be22]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

32j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1975

Related Models

• Seiko 4445-481
• Seiko 7058-480
• Seiko 6343-319
• Seiko 4594-315
• Seiko 6213-306
• Seiko 7148-903
• Seiko 7176-513
• Seiko 5283-518
• Seiko 5664-505
• Seiko 6363-417
• Seiko 6678-723
• Seiko 5275-473