I am probably mistaken but is this a 206 case? Ferrari dino 246:blocco coppa-cambio-differenziale - Accessori Auto In vendita Forlì-Cesena
Correct for an L series or early M series Dino. Not sure if the 206 case is the same as the early 246 cases.
Did the L and early M series have the cast aluminum engine mount brackets? I thought the crankcase tube was of a large diameter on the earlier Dinos.
Yes the L and early M series do have the cast aluminum bracket for the engine mounts on one side and a pair of metal ones on the opposite side. The crankcase tube is a bolt on item which can likely make the casings interchangeable. I know that L series cars have large crankcase breathers while the M series ones are smaller. The only odd thing is that there appears to be only one small breather tube whereas the M series has 2. That said it can be for a different market where the breather setup was different.
Need the gearbox stamping/number, all are different part numbers and hard to tell without side by side comparison.