I also have a RS Motimer and can find nothing on the name. It is a 12ga., side by side with hammers. There is a 7 and a 13 stamped into the underside of the reciever. It needs new hammers, firing pin nipples, firing pins and firing pin springs and a shell ejector. I believe it is a damascus twist. i am thinking of retoring it but would like to no more about it before I spend the money. Thanks