The top one in the pic is a Stevens. The SXS is supposed to be the same as a Stevens(I forget the model) so was prolly made by Stevens under the Riverside name. Maybe both were. All the SXS has on it is Riverside Arms Co. Chicopee Falls, Mass. U.S.A. On the right side it has pat. Apr 15-1915.
Not a good pic but that's it in the middle.
