International Silver Company Coffee Pot?

Hi! I would love help in identifying some of the marks here. The “O 9 1/2 C” I thought was 9 1/2 Cups, but the 48oz below it is not equivalent to 9 1/2 cups. I’m also wondering if the “52 Y” is the year it was made? I couldn’t find anything on the patent number when I did a search. I’m also curious as to the artistic style of the pot, if there is any particular one.

Thank you!