Barry
You recall correctly, you acquired that 1953 Bowman sheet at the Philly (Ocean City) Show in the late 1980's.
I have many small Bowman (1948-1950) uncut sheets. Here is the only large Bowman sheet I have. It is a complete 1st series sheet of
the 1952 Bowman LARGE issue FB cards. I acquired it in 1981.....it is very rare, as I have not seen any other such sheets in the hobby.
TED Z