After 72 years, I am surprised there is not more dust.
Even though she kept the rent paid it’s still amazing that no one had the cause or just the curiosity to enter the apartment.
I was thinking that too. Our house looks like that occasionally!
I concur. I know a fellow whose uncle had a similar apartment, also died and left it to him in estate, and it looked the same after about 2-4 years of neglect.
IMHO, somebody else used the place in secret for many years with periodic cleaning and possibly even changed out some pieces for other values.
The socialist inheritance laws probably would have collected many years ago, otherwise.
Nobody in the room, therefore no skin cells, so no dust.
Wonder why the Nazis never found out about this?