Fakes of this model have been around many years but can be easily discerner from period originals with not too much effort. Typically the rivets are poorly done or the grip emblem is the incorrect style for the period.

Also, the etched on original Hundertschaft presentation bayonets are very well executed whereas nearly all reproductions are poorly done, as with this example. There are other minute details but you get the idea. A collector need not have studied these pieces to identify a fake. Remember that starting out a skeptic will save you a headache down the line.