We occupied the third floor apartment the last couple of years before moving to Canada in 1950.
My room can be seen on the right-hand side of the image with the small balcony.
I lived in that apartment until 1970, my father had to give it up when he left in 1971. This is Ave. 41 #4403, next to the stadium. I lived in apt. 4. The terrace was not enclosed when we left. Your room was my sister's, my room was at the far end, my parents' room was the front facing the avenue, my grandparents had the maid's quarters in the back. I would love to see more pictures, I have not been back since.