HELP I need to replace some signage in condo building original built in 1939.

Lettering, probably based on a mix of Art Deco ideas rather than a single font. The rounded tips are perhaps the result of the sign machining process rather than a design decision.
As for font ideas you might pick up the oblong shape of O and the crossbars that extend to the left of the LHS stroke from a font like Aldous/Huxley Vertical http://www.identifont.com/similar?3TS
and the C & G from a font like Washington http://www.identifont.com/show?9Y0
also you might check Neutra Condensed Medium http://www.houseind.com/fonts/neutraface
Don