I believe it is discontinued, here is a link from royalshave who used to sell them http://www.royalshave.com/p/405-033-00/dovo_squarehead_bismarck_white_bone.html. I bought it on here or straightrazorplace I cant recall. I really love it though. The spike point can be a little tough for a newbie, I cut myself the first time and have a little scar from it, but it's great if you have facial hair and for getting to technical areas.
Very nice looking piece. I have two 6/8 Bismarks and missed this version when it was out. Spikes are nice and I like them as well. Looks like not many have one like yours. Enjoy.