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fkwThe normal more common 4-in-1 Exhibit cards are often found cut up into 4 cards. I once owned a group of about 100. They are seen on eBay from time to time.
But the normal 4-in-1 Exhibit cards have a different caption, they are block style upper case print, while the W517 Mini's and the rare postcards have a hand written style upper/lower case print (they are miniature reproductions of the 1926-29 Postcard back Exhibits).
1929-30 4-in-1 cut.........1938 4-in-1 cut........W517 4-in-1 cut