Tanganyika is certainly a unique source for a pipe. When I had more faith in the stamping related to nation of origin, it was fun to add a new nation. I do believe the stamping on yours. Someone might pay you extra.
That pipe was made by the Tanganyika Meerschaum Corporation as one of their own labels. They also made pipes for GBD and others until the supply of African Meerschaum ran out. I have always thought African meerschaum smoked better than all the other varieties. That's a nice pipe at a great price. Clean it up and you should have a great smoker.