Seiko Cal. 6638 - 506

The 6638-506 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 19j jewels beating at 21,600 bph, it delivers a 72 hours power reserve. [seikata-wm-b51f622faeb2]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

34mm

Case Thickness

9.9mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

19j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1984

Related Models

• Seiko 7023-501
• Seiko 7067-278
• Seiko 6290-368
• Seiko 6360-313
• Seiko 7191-950
• Seiko 3845-733
• Seiko 6319-955
• Seiko 6297-728
• Seiko 6380-159
• Seiko 7132-318
• Seiko 5625-675
• Seiko 7032-849