Yup. Fairly rare, as far as they go, too.
Look what fell into my grubby little paws today:
It resembles a standard K98 Mauser, nicht wahr? Wait, it gets better...
The flag safety's there, as is the bolt relief in the stock, but what's up with that short receiver?
A-Ha! It's a pre-war .22 LR training rifle, with the "Eagle-over-N" proof marks, and the SAd.NASDP stock cartouche. We're talking a single-shot rimfire rifle with the same external dimensions and weight as a K98 Mauser, right down to accepting a standard K98 bayonet. I'd considered such a rifle to be a Holy Grail in all things Mauser, so you can bet your Sweet Bippy I'm doing the happy dance of joy right about now.