Seiko Cal. 6644 - 644

Released in 1991, the Cal. 6644 with design code 644 was part of Seiko's domestic market collection. Powered by the 6644 caliber with 19j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-8a4bbbb3ae7a]

Also known as: Bullhead, Flighty

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

46mm

Case Thickness

15.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

50m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1991

Related Models

• Seiko 7077-483
• Seiko 5627-522
• Seiko 7145-725
• Seiko 5659-191
• Seiko 6248-454
• Seiko 5664-162
• Seiko 4591-537
• Seiko 4565-731
• Seiko 7055-473
• Seiko 7090-525
• Seiko 3813-986
• Seiko 0758-557