Seiko Cal. 6641 - 700

This Spring Drive model from 1966 features a 35mm Stainless Steel case. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-5ac7a0abcbe1]

Also known as: UFO, Crown

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.1mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

18j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1966

Related Models

• Seiko 4428-533
• Seiko 6284-418
• Seiko 7080-289
• Seiko 6310-173
• Seiko 6683-464
• Seiko 3848-418
• Seiko 6141-490
• Seiko 4515-926
• Seiko 6360-392
• Seiko 3872-472
• Seiko 7077-327
• Seiko 6249-311