I believe that "no-name" rifles of this type are not uncommon; I've seen several. There were other distributors of sporting guns like "The Army and Navy Stores" that didn't mark all of the guns they sold to shops.
Army and Navy marked most of theirs and sold them direct from their stores, but they may have wholesaled some to other shops, too. Who assembled and finished them? Dunno.
Aside from the need to keep clips handy, these are about as useful as any smallbore hunting rifle needs to be--a neat package. For me, they are much easier to shoot well offhand than an M-S carbine. Not as nice to carry, tho.
