Some more info.
I have a Russian (What I think) is an Engineering and Performance apprasial on the BF109E3 done in 1941. Its 117 pages and very detailed but being written in Cyrillic is hard going. Evident in the document the E3 has Auto Prop pitch.
Buried in the document for what its worth is this graph:
Looks like two sets of TAS v Altitude lines for different conditions and two sets of Time to height lines "t".
Be nice if a Russian speaker could repost the graph with the legends to the lines and the statement at the bottom in English.