Neutra Condensed Light  Suggeriti da fonterizzle 

reminds me some font by House Industries, but don't remember the name...

Neutra Condensed Light, answering myself. :-)
can it be?

that's the one i was thinking about, thanks.
Neutraface Text Light

but it's not the good one.
Approaching, but not the same

Yes, approaching but the "G" and the "M" are clearly different.