heres one for you I have a lew Horten 3913 that is the frame of the 3913NL without the NL on it it has been throated and feed ramp polished It also has on one decker/safety on the left side of the gun I found this out because the serial number that lew Horten has is xx3913 They still have the records of this run that they made They did other things to the gun it was made in august of 94 when they discontinued this model iT has other things done to it