Note that an alternate version of Aristocrat 413 exists. It is also by the Blues Rockers, carries the same matrix numbers, and nearly identical titles to this version of 415. I would assume the alternate version of 413 was an error and that this was done to set the catalog right. I have photos of both versions but can't speak to their relative rarity. I wouldn't pass up a 415 in hopes of finding a 413, though.