[Correction Edit:
I left my original text below but...now I've done some research and it looks like the knife that RR (and this is definitely an RR) calls a Doctor's knife does indeed have a large and small cutting blade and no spatula. A fruit testing knife seems to usually have a single blade, this one definitely has 2. It seems that this might well be RR's version of a Doctor's knife and I learned something new. That is always a good thing.

I would have to assume that the end of the knife is sealed as that DOES appear to be a correct requirement of a Doctor's Knife although it doesn't appear sealed above. That said, the main blade also seems longer than this pic of a RR Doctor's knife - so, hell, I dunno.
end edit]
*************************
It looks like a RR Doctors Knife. I keep an orange one in my desk organizer at work.
I thought that one of the "blades" in a Doctor's Knife was, in fact, a spatula, not a cutter. In the case of that knife, both blades are cutting blades. Perhaps I'm wrong about the spatula and some may not have it, but that is what I based my comment on and what I always have thought was one criteria to be considered a Doctor's Knife. But, I could certainly be wrong. Lol! I often am as my Wife enjoys reminding me.
BTW, while I have the knife already sealed in its box to be mailed, the other aspect of a Doctor's Knife is that one end should be sealed as that end is used to crush medicines and that crushed med should not get into the knife's mechanism. I don't recall the end being sealed (in the pic above it doesn't appear sealed), but here I'm relying on memory and perhaps it actually is sealed. But that isn't how I remember the knife. Of course memory is about as reliable as my being right...
Pic of Doctor's Knife