From a Classic Driver online article:

This extraordinary Alfa Romeo Giulia 1600 Sprint Special was delivered on 03.10.1963 in Pescara (Italy) and was home (city) of their time in Italy. The car was optimized for performance after delivery by Autodelta. Cylinder head, camshaft and manifold were changed and the output increased to 125 hp.

To read more: https://www.classicdriver.com/en/car/alfa-romeo/giulia/1963/716133?utm_medium=email&utm_campaign=Classic%20Driver%20Daily%203302019&utm_content=Classic%20Driver%20Daily%203302019+CID_bf23adaa64328b289e7d01e1b717e54a&utm_source=newsletter