Seiko Cal. 6638 - 911

The 6638-911 is a sought-after Solar piece from Seiko's golden era. Powered by the 6638 caliber with 20j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-5938adfbf00a]

Also known as: Panda, Sportsmatic

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

90m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1987

Related Models

• Seiko 4551-754
• Seiko 4566-424
• Seiko 6652-212
• Seiko 4575-734
• Seiko 0753-559
• Seiko 4441-971
• Seiko 0717-303
• Seiko 7071-382
• Seiko 4485-419
• Seiko 4494-691
• Seiko 6215-121
• Seiko 7111-264