Hi Ian,
I must agree with Nats and Trigger on this. As you can see, Eickhorn did produce R�hm blades with the big oval. But, besides that, all the indications are, that this is a ground R�hm, due to the fact, and this is only as far as I know, that all, or most presentation pieces were bench marked! To answer your question as well in regards to whether the blade has any wavyness on it, yes it does. In fact, the whole middle portion of the blade is missing its spine, and, one can definately feel a very slight indentation running down the middle of the blade. It was more than likely factory done, as one can hardly see it, but its there! Very difficult to try to picture it, I tried, but could not get the effect desired!? I have though, included another better pic of the TM and as you can quite clearly see, the remenants of the right hand leg of the M in R�hm.
