Bracco's car is first seen in the 1951 MM as #332. It then went to Le Mans as #33, and afterwards had its roof lowered for the 6 Ore di Pescara, run in August, 1951. See pg. 108 and 119 in the (other) book. That is why the T/K photos show it both with the original roof from MM and Le Mans, and its later lowered roof.
Thank you for clarifying that Geoff. I must say I thought it odd that such a mistake would be made in the first place and even more odd that it had not been corrected .... unless, as in this case, it wasn't a mistake at all!!!
Andy