Hi, I knew Id seen this pic below a few years ago, but could never find it again. Well I was going through some pics on an old computer and found it again.
This is the proof that many of the 1947 Bond Bread cards were later printed with square corners and issued in a boxed set/series.
I remember Ted Z saying he though they were from ca.1950
here is the proof...
ca.1950 W571's inside their original boxes
But then again not all square corner cards are authentic, there are also modern reprints that were made with the image being of lower quality, and I believe the card stock is a different color on back too.