Hi-
I am sorry about bumping this old thread but I recently purchased 15 Tip Top Weekly magazines (most with baseball covers) and I can add the following numbers to your checklist of baseball covers: 277, 278, 281, and 541. There is a chance that 547 is also a baseball cover (I wrote it down as such) but I did not scan it and cannot confirm it as I have already sold the lot (Bigfish, a fellow Net54er, has them now). Below are the scans for 277, 278, 281, and 541.
Alan Elefson
aelefson@hotmail.com