I'm not certain about this one, as I haven't managed to identify the car element, so it's a sort of reverse-engineering job.
I think the combination is E-15-z. Working backwards, Extra z is a 1920s Jowett, and with that and the name on the side of the bonnet, it's possible to identify the man sitting in it as Robert Ellison. He would go on to drive a Jowett Jupiter in the 1952 Monte Carlo Rally - not successfully, as it happens, as he crashed during the event. The car he drove was a coupe with bodywork by J E Farr & Sons of Blackburn, Lancashire.
This seems to be relevant, as Architecture 15 is called the Farr Building in Allentown, Pennsylvania, once a shoe factory and retail outlet, but now mostly up-market apartments.
But the car is the problem. I'm guessing it's E, and bodied by Farr, but I haven't been able to prove it. It's not Ellison's Monte Carlo car, which was restored, and still exists. Is it another Farr-bodied Jupiter? One did come up for sale recently, in need of restoration, but the listing no longer has any pictures. Or am I barking up the proverbial wrong one?