This is a six-color circular patch with a red border surrounding both sides of a yellow ring.  Inside the yellow ring is a white background with a CD 135 Chicago Diamond insulator pictured.  The insulator is light blue outline in a darker blue.  Inside the yellow ring is the name of the club written with green thread: GREATER CHICAGO/ INSULATOR CLUB.  The patch is 4 inches in diameter which makes it the largest circular patch and the second largest overall.

Cost: $6 postpaid available from:

• Greater Chicago Insulator Club
• c/o Bob Stahr
• 515 Carriage Dr. Unit 2D
• W. Chicago, IL 60185