The 12 and 59 have alarge space between them There is a screw holding the bottom plate also a screw under the trigger guard that goes to the top of the receiver back of the safety. No cocking indicators no crossbolt has a screw through lever. Has no screw under lever.Stock is pinned and looks factory to me.The buttplate reads original sauer made in Germany.Thank's ellenbr for the response. oldokieknife