Hi Don,
I have a chip from the Corker Club, Chicago, that is similar to the "C" in a "C" except the Corker Club logo has oblong c's instead of the round c's in your match cover.

The Corker Club chip is in the USPC photos in Kreeg Herz' book. My photos and most books are temporarily in storage so I do not have access to them.

We have a College Club listing in TGT as an unknown. Ernie Wheelden has the chip. I sent him an email to see if his chip matches your logo. I also sent him a link to your post.

Allan