Clues to solving the age old mystery. Last night in a Clean Sweep auction as a Crawford Detroit Free Press card sold for 5500.
https://www.cleansweepauctions.com/i...tem=0000658865
Luckily they showed the back of the postcard which has a promotion stamped on it. I don't think anyone has ever seen this stamp before as they are normally blank backed. Plus as Kevin mentioned, we still have yet to see a postally used one from this series of 16.
So my guess is the Detroit Free Press did a print run to promote Sunday paper sales and then pulled the plug before they got in circulation. Most likely they were gonna be distributed to paperboys but just a guess. The sizes variance makes sense as Orlando said. I've seen the same size variances on the Brush PC series to.
Very cool item that sold last night and congrats to the new owner.