I have not located this, and am inclined to think it is custom, although it might be a mix of lower case from one font, and initials from another. Sometimes the 'TM' may also indicate custom lettering not to be duplicated.

- Mike Yanega

It is quite similar to Poppl Residenz
but the bottom-end of /L is different,
and all endings of Poppl have a small curve, instead of being flat.

I think it is Poppl Residenz: it has been fiddles with. Check out the tail of the Z…

Thank you gentlemen!