Sept 22 (Reuters) - EuroTeleSites AG shares made its Vienna stock market floatation opening at 4.31 euros on Friday, as Austria's leading telecommunications firm Telekom Austria spins off its radio towers business to concentrate on its core business.

Books closed on Thursday for EuroTeleSites AG, as it is now named, with a final price of 4.95 euro per share. (Reporting by Tristan Veyet in Gdansk Editing by Riham Alkousaa)