A few available old stock case  found .so offering  one or buy a few for special occasion or group association wedding party etc. The back plate is magnetic Chromes some kind of a a stainless steel.The saddle appears to be non-faris.,An educated guess brass saddle. I haven't measured it it's in a 2x2 in. area ,the tips on the rope are some type of non-ferrous. I don't want to say silver but it could be to be determined I don't have the equipment to test it or it could be stainless steel but I know these are from around 1970 give or take a few years definitely over 50 years old.