Seiko Cal. 6640 - 149

This Spring Drive model from 1968 features a 42mm Stainless Steel case. It features a Burgundy dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-f9d192b741cc]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

9.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

140m

Dial Color

Burgundy

Jewels

29j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1968

Related Models

• Seiko 6287-210
• Seiko 5276-340
• Seiko 6698-630
• Seiko 4526-914
• Seiko 3835-661
• Seiko 6163-634
• Seiko 6143-545
• Seiko 6391-413
• Seiko 0783-666
• Seiko 6664-859
• Seiko 7026-516
• Seiko 4417-131