What kind of error Morgan is this?

Went to the coin shop yesterday, May 2nd. As soon as I got there he pulls out a long box with 'new' stuff all priced out and ready for my preview. I pulled out a nice 1880-S BU Toned Morgan beauty. (I'll post that picture in another article.) Anyway, going through about 20 or 30 coins and from the side of me he slides a coin to me and says take a look. I look at the obverse.. a few neat marks. I turn it over and notice the goodies. Some sort of blockage on the reverse when it was being made. Looked at this for about 10 minutes but I knew the minute I saw it that this one was going home with me...(sounds like I was picking up a women or something).

ENjoy the picks, and offer thoughts about it, thanks.

http://i5.photobucket.com/albums/y187/wrcnjc/1887-2.jpg

http://i5.photobucket.com/albums/y187/wrcnjc/1887-3.jpg

http://i5.photobucket.com/albums/y187/wrcnjc/1887-4.jpg