Seiko Cal. 6647 - 631

The Seiko 6647-631 represents an important milestone in Seiko's 1969 lineup. It features a Green dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-960aab2e78ae]

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1969

Related Models

• Seiko 6217-700
• Seiko 4479-215
• Seiko 5278-969
• Seiko 5682-891
• Seiko 7076-559
• Seiko 6666-650
• Seiko 5221-872
• Seiko 4497-989
• Seiko 0773-161
• Seiko 7050-729
• Seiko 0765-240
• Seiko 4420-843