Seiko Cal. 6638 - 709

The 6638-709 is a sought-after Solar piece from Seiko's golden era. With its 18mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-e6e46ed323da]

Also known as: Bellmatic

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

42mm

Case Thickness

9.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

130m

Dial Color

Black

Jewels

17j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1971

Related Models

• Seiko 6273-437
• Seiko 5662-572
• Seiko 6373-771
• Seiko 4551-658
• Seiko 0732-536
• Seiko 3845-466
• Seiko 4579-753
• Seiko 6295-459
• Seiko 7071-105
• Seiko 7191-184
• Seiko 4569-165
• Seiko 5667-319