This is a car which appeared in the Allcomers Invitation Race at the Richard Seaman Memorial Trophy meeting at Oulton Park in August 1992. It was entered by Anthony Mayman and driven in the race by John Harper.
The car was shown in the programme as a 1952 Ferrari with an engine capacity of 2496cc
First owned by Frenchman Louis Rosier, hence the blue colour, it was originally a 2 litre1952 Ferrari 500, shown in www.barchetta.cc to be serial number 0186F2
The car was fitted with a 625 engine in 1954 and in one of www.slotforum.com's forums it says:
'Rosier's 500 had a 625 engine that year, for the new 2.5-litre F1, so it was often described as a 500/625.'
I understand that the chassis had to be lengthened to accommodate the larger engine