A pleasure to see this topic back again! More than anything else, the displayed materials and observations bring back happy memories of some collaborative research done about 15 years ago! Yes, David McKinney and Michael Müller were deeply involved, also Adam Ferrington and some others 
Not surprisingly, some of the questions brought up here concerned us already at that time. One point was simply what we were researching. Obviously it's not possible to construct reliable individual race records for the early monoposto Ferraris from printed sources. Fotos do not really solve the problem, as sufficently detailled pictures were not available in a number of situations when it mattered for serious louvre-counting. Definitely engines went in and out and pending on ocassion, some cars shifted from F1 or Libre to F2 and back. Engines and suspensions installed surely make a visible difference on fotos, but the "chassis", rather frames in their simplicity less so. And Gilco could easily supply a spare at any time ...
At one point in the individual histories of the various cars, however, there is invariably some certainity about their specifications. That was when a particular "unit" of engine, frame etc. passed to a private owner and these Ferrari sales were usually reported in some detail in contemporary publishing. During modern research on the surviving cars a number of original sales documents have come to light and became even known to the public. In general it emerges from these materials the customer monopostos were sold under their (probable) Team Ferrari s/n up to late 1949, but got special s/n from early 1950, probably after interference by Italian tax revenue. This is the V12 monoposto's approximate order of serial numbers:
125/166 SWB 216 cm (as apposed to 166 SC and MM)
02C under this number to Vandervell, later to Vallone as 0100
04C to AC Brasil as 0106
06C destroyed?
08C under this number to Sommer, later to AC Brasil as 0108
10C under this number to Whitehead, later to Ecurie Ecosse
12C to Scuderia Guastalla as 0112, later to Ecurie Rosier
01F to Sterzi, later to Staechlin as 0104
011F to AC Argentina
125/166 LWB 242 cm
C01 to Whitehead as 0114
C02 to Vandervell, later to Fischer with 212 engine as 0110?
013F to AC Argentina
166 LWB 232 cm
F2/50/1 to Scuderia Marzotto as 0118
F2/50/2 Prototype 500F2 as 0102?
F2/50/3 to Scuderia Marzotto as 0116
375 F1
C04 to Uruguay as 0566
chassis number unknown to Vandervell as 010
chassis number unknown rebuild as 375 Indy Mauro?
chassis number unknown rebuild as 375 Indy/4 Keck/Ball?
"375/1" to Landi
375/2 to Rosier
375 Indy
375 Indy/1 Ascari later to Chinetti as 0388
375 Indy/2 Grant Piston Ring Co/Parsons?
All other 1950s customer monoposto Ferraris are (or are based on) 4 or 6 cylinder cars.
Unfortunately this does not solve the riddle which 375 F1 was which!
A few closing remarks: at the Italian GP 1951 Landi practiced a 375 F1 but raced a two-litre car, apparently a prototype for the new F2 range. But for 1952 Landi neither got the car he practiced or raced at Monza for 1952, it seems. For the new season Brazilian President Getulio Vargas bought him rather one of the two camelli 375 F1s presented as new for the ACI's prize. Indeed, to think in this direction was originally inspired by a note in Mr. Nye's "Skullduggery" column many years ago, refering to Victor Pigott's observation to question the NZ car's claim to be Froilán González Silverstone winner. At least to me both 375 F1s raced for the first time by their respective new owners Landi and Rosier at Piriapilis in March 1952 are looking like that!
Well, for the period there are internal Ferrari race reports, and for some reason I have here a copy of No. 19 for 1951 on British Grand Prix. In this the "macchine" for both Ascari and Villoresi are given as "375 M", while González has a "375/2 S"...
Whatever that means for the claim to be the Silverstone winner, there is even a small chance it finally ended up in Froilán's hands! After retirement from European GP racing, González prepared a new start in South American single-seaters for 1957. When the Ferrari team arrived in Buenos Aires for the season-openers, they brought along an old F1 chassis from the era of the 4.5-litre engines. According to Froilán's autobiography ghosted by Roberto Carozzo, it had been used during 1952/1953 in F2, during 1954/1955 in the 2.5 litre Formula 1 and was now shortened 10 cm to a 2.22m wheelbase. In the Argentinian press it was refered as s/n 0482. Equipped with a Bernardo Perez prepared Corvette engine it started it's successful local career later in the year. Yes, I know Peter Whitehead's Ferrari for his southern hemisphere tours in 1955 and 1956 is known by the same number ...
Edited by O Volante, 25 February 2024 - 18:19.