drew

i have seen window screens like that from the 20s/30s ...
the car, while it has the steering wheel on the left, could have been
european - not just from the states.
it looks kind of like an old touring car ( convertible )
its hard to ID something like that just from the rear-quarer
but it has the "feeling" of one of these cars:

http://www.european-concours.com/

you could get a better idea of the window treatments by contacting
a restoration place like http://www.architecturaliron.com/ .
if you send them a copy of the photo, they can ask around seeing that they
make repros of this sort of thing ...

the brickwark behind = flemish bond+downspouts are all bronze and look
typ. 1920s ...

good luck!

john