Perhaps also influenced by Weiss? See the M for example. But Weiss doesn't have the funky r.

Yves, I tend to agree with you. That l.c.'r' looks like a rather awkward modification. Does it really look familiar to you? The font is very monotone, and the 'g' doesn't look like it fits well. The closest 'g' I found to that so far has been David Quay's Titus. Not much else about Titus looks close, though. I still haven't found anything else with that 'r'.