Focusing on the signature, there is a clear difference between the Dalet of Dr. and the second letter of the name, which seems to me be a Tzadi.
Always important to keep in mind that in the 1950's, people did not necessarily fill the POT forms, they only signed.

So, I searched graves.me for Ratskovsky, in Hebrew, in the general area of Haifa.
Found a Bertold Ratskovsky
And he was a Dr - you can see it on his gravestone.
1B2EB0FE-5403-4E94-9734-ADBC64E78848.jpg (666×888)
Wondered if this could lead you further.

Are you aware that you can ask Yad VaShem to correct information that was transcribed incorrectly?
--
Odeda Zlotnick
Jerusalem, Israel.