This sandpaper pointer has no markings but is most likely a Gem made by Gould & Cook of Leominster, Massachusetts. It was patented by Charles E. Gould and Frank H. Cook in 1886. I have had a few of these in the past and have seen others and all of them were missing some parts or the casting broken in some very visible or important place. It does appear that the casting on one side of the base of this one is very rough and may indicate that a piece was broken off but, it is pretty straight, not very noticeable and does not seem to effect the balance of the piece since it does stand by itself without being bolted down. The estimated condition rating on this pointer is a 2,2.