THIS IS AN AD IN THE 1938-39 F C TAYLOR FALL TRAPPING SUPPLY CATALOG,,,IT SHOWS THE PLAIN JAW AND THE DOUBLE JAW,,IT SHOWS FOX TRAP ONLY ON THE SINGLE JAW VERSION, AND I HAVE NOT BEEN INTO COLLECTING VICTORS FOR A LONG TIME AND CAN NOT REMEMBER IF THE ADDED FOX TRAP TO THE 22 OR NOT,,,I ALWAYS LIKED THAT TRAP,,,I CAN NOT REMEMBER IF THE LATER VERSION OF THIS TRAP WITH SQUARE JAWS HAD FOX ON THE PAN OR NOT BUT I THINK IT DID FOR AWHILE,,,,THERE IS NO MENTION OF THIS TRAP IN THE 1937-38 CATALOG,,