Seiko Cal. 6648 - 257

The Seiko 6648-257 represents an important milestone in Seiko's 1970 lineup. It features a Green dial protected by a Sapphire crystal and offers 140m of water resistance. [seikata-wm-4334d7d70d86]

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1970

Related Models

• Seiko 7137-960
• Seiko 6396-348
• Seiko 3888-330
• Seiko 7057-173
• Seiko 3867-448
• Seiko 6222-830
• Seiko 6157-802
• Seiko 5615-939
• Seiko 6120-718
• Seiko 3854-912
• Seiko 4498-918
• Seiko 5623-212