It seems very similar to some of Luc(as) de Groot’s work, such as Corpid. It looks slightly more condensed than Corpid, and the stem on the ’u’ seems bent, but I think the b is a de Groot shape.

- Mike Yanega

in case this remains unsolved: Pragma is similar, and Nubian is not too far off either.

This is Siegfried Rückel’s FF Nuvo.

Ah, Yves to the rescue. Good catch from those few letters. That’s a new font for me.

- Mike Yanega

I think the b is a de Groot shape.

Well, Siegfried Rückel studied under Luc(as) de Groot in Potsdam. An amazing eye, Mike! ;-)