Seiko Cal. 6644 - 392

Released in 1968, the Cal. 6644 with design code 392 was part of Seiko's domestic market collection. Powered by the 6644 caliber with 34j jewels beating at 36,000 bph, it delivers a 61 hours power reserve. [seikata-wm-9d411de88ac7]

Also known as: Rally

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

9.1mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

150m

Dial Color

Black

Jewels

34j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1968

Related Models

• Seiko 5636-277
• Seiko 7132-948
• Seiko 7094-297
• Seiko 5219-480
• Seiko 6645-561
• Seiko 6134-283
• Seiko 6356-771
• Seiko 6253-568
• Seiko 6199-433
• Seiko 6148-336
• Seiko 0765-890
• Seiko 6370-681