A special case of repurposed glyphs. Very common in dry transfer lettering, see this comment by Mark Simonson.
Contributed by D Jones
Contributed by Garrison Martin
Contributed by Florian Hardwig
Photo(s) by Buro Destruct on Flickr.
Photo(s) by Corey Holms on Flickr.
Photo(s) by Klaus Hiltscher on Flickr.