Im certainly no Rohm expert but a few observations generally about the dagger.

1. Seems in your for sale add it has a plated eagle in the grip?. Should this not have been Nickel Silver for an early Rohm One?.

2. The terrible abrasive scratching to the blade is often done to these to make them look like the dedication and front of the dagger do in fact match.

3. The blade looks like it has been sharpened down the edges. This can be as a result of the blade being polished down heavily to put the new dedication on (If it was from an erased Rohm to start with).

4. Look length ways along the blade quite often the fake ones are no longer straight on the reverse. They look rippled against the light and the central ridge goes wavey.

5. If you look at the abrasive scratching by the makers mark it looks like it goes under the actual scratching that supposidly removed the name? not the other way around. This would mean that the blade was scratched up before the dedication was removed???.