Seiko Cal. 6647 - 456

The Seiko 6647-456 represents an important milestone in Seiko's 1968 lineup. It features a Navy dial protected by a Sapphire crystal and offers 40m of water resistance. [seikata-wm-1dedfba1d621]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1968

Related Models

• Seiko 4582-171
• Seiko 5264-409
• Seiko 6340-117
• Seiko 6642-295
• Seiko 3850-913
• Seiko 6271-907
• Seiko 6241-749
• Seiko 3887-211
• Seiko 7169-552
• Seiko 5224-534
• Seiko 5619-888
• Seiko 6610-755