Well. - almost complete _ there are two types of the 1956. I have one, its just not in the pic. Centered is a very rare WM RR Copper HUbbard nail (large size). I am sure there must be more, but I know of two of them. Both were found by my late friend Dave Heiss. When I researched these, Jeff Oaks had never heard of one. I think its on his website now. I believe the WM is the only line that drove the nails into the tie ends and parallel to the ground.