I don't think so, but I'm really not much of an error collector. This should help. http://www.lincolncentresource.com/FAQ/Poormansdoubleddie.html
The "poor man's 55 is of course not a DDO, it is a case of deteriorated dies in the 55 part of the date. Usually, it it the right side of the loop of the 5, but I guess it could incorporate other areas of the 55. I "see" a hint of it in your last 5, but not as evident as usually presented. Maybe it is the contrast of the photo. Since there is no premium ( except maybe on eBay), it is a curiosity piece. Jim