Seiko Cal. 6646 - 207

The 6646-207 is a sought-after Quartz piece from Seiko's golden era. It features a Black dial protected by a Acrylic crystal and offers 80m of water resistance. [seikata-wm-647b426ab1b4]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Black

Jewels

36j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1965

Related Models

• Seiko 6645-353
• Seiko 5232-976
• Seiko 4578-726
• Seiko 6194-434
• Seiko 6181-533
• Seiko 7154-660
• Seiko 6362-777
• Seiko 3859-331
• Seiko 3839-756
• Seiko 6677-970
• Seiko 4456-488
• Seiko 7141-926