Jorge, the Model 60 as pictured in the 1961 Stoeger catalog did not have sideclips, but the Royal did. I'm guessing what you have is a gun sold on Ramstein back in the 50's, which was either a pre-Model 60 version or a slightly different version of the same basic gun, just not made for export. I ordered a Beretta BL (I think -4) OU through a military rod & gun club in Spain in the early 70's. The versions they sold had sling swivels, which were missing on the ones exported to the States. I'm guessing pretty much the same story with your gun.
