Seiko Cal. 6647 - 657

The Seiko 6647-657 represents an important milestone in Seiko's 1967 lineup. Powered by the 6647 caliber with 19j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-171ea5cfd2e0]

Also known as: Pogue, Helmet

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

9.9mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

19j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1967

Related Models

• Seiko 5611-249
• Seiko 0776-366
• Seiko 4550-167
• Seiko 7129-365
• Seiko 6693-464
• Seiko 6217-231
• Seiko 6186-285
• Seiko 6272-906
• Seiko 4553-686
• Seiko 6348-988
• Seiko 5691-490
• Seiko 4431-298