operaman, as far as I'm aware no accepted examples of the so-called 'Japanese delegation' daggers have ever surfaced. If I remember correctly, Tom Johnson featured a similar dagger with provenance that he featured in one of his volumes, however the one he showed had the correct Horster configuration with the correct tapered grip and right facing locket eagle. He described this example as a prototype, and as far as I know is the only 'accepted' version to surface, which is quite different to this one shown.
The example shown in this thread conforms to known reproductions. The most obvious red flags are the angular grip and the full-frontal eagle. This in itself is condemning as the manufacturers of these copied did not execut the HJ Eagle emblem correctly. If you compare the locket eagles on both manufacturers of these daggers, namely Horster and Eickhorn, you will note the correct use of the HJ emblem, different to the example shown here.
This repro type also features in Frederick Stephens Reproduction? Recognition! the key reference work in reproduction TR edged weapons. Also, the dedication on the blade makes little sense in the context of an
honour dagger 'For loyal service in the German Youth'
I have personally encountered two variants of this reproduction, the one I believe was German made which had a magnetic scabbard, the Spanish copy had a non-ferrous scabbard which was die cast.
If these were period and original they would very rare and certainly not encountered on on-line auctions etc., not to mention they are fairly plentiful...
Red