Even the postmark on a battered, old postcard can help.
I went out yesterday and bought old postcards of the twin towers.
I also have a few old postcards if these are of any use.
There are artillery shells, old postcards going back to the 1900's.
Someone gave us an old postcard of the tiny main street.
Didn't you see the address on some of those old postcards?
In mid-1870s a school church was made in the same building, and the cross may be seen on some old postcards.
From his back pocket he took a very old postcard.
I would discover one thing, maybe an old postcard, and I'd get the idea for a piece.
An old postcard showing the baths complex can be seen here.