I agree the posted refrigerator is a Kelvinator, as we had one like that in our basement when I was a kid. It is possibly a 1940-41, or a 1945 model, based on the trim shown.
The man who passed was much younger than I expected; though it was going to be someone in their 90's. Sounds like he was an interesting man.
That apartment is messy and dirty, but I've seen a lot worse. Currently I and several other members of historical society are cleaning out a horder's house, and that apartment doesn't look to come anywhere near what we're dealing with. We can't even access some rooms until we get others cleared out.