This keychain was probably a freebie from a Texaco gas station. In the 1930s they used these two Scottish Terriers in their advertising with the word "Listen". There is also the word "Texaco" and a "T" on a star in a circle. The disc is silvertone. On the back of the disc is embossed "Texaco". The disc has a 1" diameter without the loop. There is a brass "ball" chain that would hold the keys.
This keychain was used. It is worn a bit on the back. There are a couple of nicks to the edges!! This is a very hard to find Texaco piece!!