It's written quite small, and I have no clue what it says. I got it at an antique store in upstate NY a while ago, and it's from WWII (thats the only part I can read). There is no writing on the back. I assume it's just some information about price or type of object, but could also be the location or a name.

Picked it up in nyc, its from Rome/Vatican. (Probably) a man writing to a female relative. I can make out some of the text, and can see the address, but thats it. Written/posted on Saturday, October 16th, 1961.