Yes, this looks like one of those Rawson Shield harps. Did this one get left outside for a long period of time or something?? Anyway, the player sits on one side in the normal manner, and the strings on the player’s half are the naturals, while the strings opposite the player are the sharps, if this is indeed a Rawson harp. I wonder if it’s either an earlier version or else perhaps someone else’s take on the concept, as the construction looks a little different from the Rawson ones, particularly the soundboards.
Did you ever find out any more about this, Philippa? Where was it advertised?
-Gregg