Illinois Bell - Telephone Pin

Hello,

This is a pin from Illinois Bell. The predecessor was Chicago Telephone Company. I am still looking for a pin issued by Chicago Telephone Company. I found where they tended to award a lot of Theodore Newton Vail pins, but they are difficult to find too.

As shown, I have the entire set, including up to the pin with 9 stars. The 50 year pin has a diamond mounted over the bell. Thank you for stopping to take a look!