What happened to the identification of the 40/50? Doesn't your correspondent have any more info about the pics arttidesco?
ST 
Sebastian the only info Geoffrey had was the erroneous belief the unattended vehicle he took photo's of was built in 1928. He left the rest to me, I suspect Geoffrey is too busy tending the needs of his beloved
XK 140 to have time to participate in forums or chasing leads with the Uppsala local authorities and Silver Ghost Association as I have been enjoying today :-)
To summarise today's progress we are talking about an Uppsala Sweden registered 1921 Hooper bodied 40/50 tourer chassis number 19LE belonging to a Mr Tragardh who may be on tour with the SGA in California. Not bad going for what I believe is a Motor Racing enthusiasts thread.
If there are any more details forthcoming from Mr Tragardh or Uppsala Authorities I shall keep you posted, thanks to everyone who has contributed you will all be named on the blog as and when.
Any one familiar with Swedish geography know if there are any motor racing circuits near Uppsala ?