Seiko Cal. 6646 - 678

This Spring Drive model from 1966 features a 39mm Titanium case. It features a Black dial protected by a Acrylic crystal and offers 90m of water resistance. [seikata-wm-fbb81b053dd4]

Also known as: Pogue, Bullhead

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Black

Jewels

21j

Frequency

36,000 bph

Power Reserve

43 hours

Year

1966

Related Models

• Seiko 5676-384
• Seiko 6651-741
• Seiko 6251-353
• Seiko 0743-901
• Seiko 6672-917
• Seiko 4540-424
• Seiko 6626-537
• Seiko 3829-655
• Seiko 3819-145
• Seiko 3876-857
• Seiko 6291-940
• Seiko 3876-803