The original tires fitted to this 1974 Dino 246GTS, 06450, were Goodyear. I never knew any tires other than Michelin XWX were fitted. I bought my car used, but the tires were XWX. Look at 0:53 for the Identification Data Form.
Hi These days there is still a choice. https://www.longstonetyres.co.uk/classic-car-tyres/ferrari/246-gts-dino.html#page=1 Michelin XWX or Pirelli Cinturato CN36