When I picked it up I expected that there would be something on the back of the card saying what race was being depicted and giving some information about the cars and drivers shown, but instead.....
.....all that it says is 'Flags 1936'. The cars shown are obviously an Alfa Romeo 8C 35 or 12C 36 leading a Mercedes-Benz W125 - the Alfa could have been in a race during 1935, 1936 or 1937, but the W125 was only raced in 1937 so the date of 1936 is incorrect. Trawling through the major races of 1937 the only race this could possibly be is the 1937 Italian Grand Prix at Livorno, where the number 22 Alfa Romeo 12C 36 was driven by Tazio Nuvolari, who handed the car over later in the race to Guiseppe Farina, and the number 6 Mercedes-Benz W125 was driven by Herrman Lang. I've come across a photograph of the 1937 Italian Grand Prix of two of the Mercedes-Benz W125s about to round a corner where there's a fence exactly like the one in this painting, which seems to confirm that it is Livorno.
NB: This is the Daimler AG photograph I found showing the two W125s apparently at this corner in the 1937 race. (Photo from SportCarDigest.com: http://www.sportscardigest.com/silver-arrows-at-the-goodwood-revival-2012/4/)
