Seiko Cal. 6647 - 400

Released in 1999, the Cal. 6647 with design code 400 was part of Seiko's domestic market collection. With its 18mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-3cf4cd81007f]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

35mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

33j

Frequency

28,800 bph

Power Reserve

46 hours

Year

1999

Related Models

• Seiko 4594-455
• Seiko 6195-423
• Seiko 4537-928
• Seiko 6326-235
• Seiko 7128-308
• Seiko 6164-113
• Seiko 3875-509
• Seiko 6280-265
• Seiko 7136-826
• Seiko 6144-821
• Seiko 7144-912
• Seiko 4443-670