Here's another picture I found on the same film as the Ferrari ones, this is a 1/4 scale working model of a BRM V8!
The caption to this model reads as follows:
"1/4 scale BRM 1.5 litre V8 Grand Prix engine. Made by Prof D H Chaddock over a period of some 10 years as the culmination of a lifetime of model engineering.
Machined entirely from solid magnesium, aluminium and high strength steels. The only concessions to scale are BA threads (sizes range fron 6 to 12) and slight reduction in bore to bring the capacity to 15cc. Virtually complete it only requires manifolds and carburettors to run.
The model has the full oil lubrication system of the original with a duplex scavenge pump for the dry sump and a separate pressure pump feeding all bearings including a spray over the face of each cam follower. All the pumps are gear driven from the camshaft.
To reduce the size of the camshaft gears the overall 2:1 reduction is made in several stages using hardened and ground gears, ball bearing mounted, in a separate steel gear case to limit the effects of thermal expansion. There are 24 gears in all.
The pistons (machined from the crown of a Bristol Jupiter aero engine piston) have both oil control and compression rings, with a floating gudgeon pin retained by circlips. Intended to be a working model and expected to produce well over 1hp at 25000 rpm."