Anybody ever seen this before, and/or know what face(s) it originates from?

Recent example from Norway:
http://1.bp.blogspot.com/-nR1srWAslfo/TwY0p-ET_pI/AAAAAAAACqc/X5Wq7ESGj3...
I've written lowercase q with a crossed descender since I was in college, and that's a long damn time. I can't remember anyone teaching me to make q's that way, but I surely didn't invent it. I either saw it printed that way, or saw it in someone else's handwriting. I picked up the habit of crossing my 7's (considered an affectation here in the US) from a friend of mine around the same time, and maybe he crossed his q's too.
And here's Nicholas Jenson, with a crossed p, as a sign of elision, I think.
http://www.noamberg.com/thesis/blowrg/wp-content/uploads/2008/09/origina...
Captured from web.archive.org on 28 Feb 2015. view this capture