I know we've seen a few different parcel cards from time to time. I didn't find a thread that these would fit right into (and I couldn't find the one I was thinking of), so here they are:
Two parcel cards from occupied Poland. The first canceled in Krakow,

and the second in Czestochowa,

which, in the course of Googling, I discovered to be the home of the Black Madonna, a popular visit for pilgrims.
Both companies appear to still be in business.