Seiko Cal. 6646 - 920

The Seiko 6646-920 represents an important milestone in Seiko's 1966 lineup. Powered by the 6646 caliber with 35j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-a52788fcf6d5]

Also known as: Emperor

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

44mm

Case Thickness

13.3mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1966

Related Models

• Seiko 5279-360
• Seiko 4524-647
• Seiko 6232-630
• Seiko 6647-156
• Seiko 4547-936
• Seiko 3833-156
• Seiko 6252-505
• Seiko 6197-351
• Seiko 7175-469
• Seiko 6656-722
• Seiko 7142-723
• Seiko 6224-857