Not to be confused with the Nikon S2.

This seems like a Royal 35S variation, possibly branded on the top plate as
a Mark S-2, but I am not sure of this. This NY (Jersey?) advertisement, by
Sterling-Howard, 561 Tremont St., New York, which I found by chance is the
only image I have seen. Maybe it was notbranded on the top plate, and if
it is not, then I have the modelbranded as Royal already. But I'm unsure.
REWARD Offered ! *** Edit (I found one - after more than 10 years of searching.)***

Can anyone tell me more?

Also searching for what I believe was a Royal branded as TORCON or Torco.