I have these pre-WWII N frame Magna stocks. Pictures show condition. If you have questions please email me. There is a small chip on the back of one of the horns. Right stock is marked with 59775. Research has indicated that they came off of a Registered Magnum sent to KC MO PD.
Friend of mine told me the following:
Set came from a shipment of 213 units shipped to the KC, MO, Police Dept. Specific Registration Numbers unknown. This shipment had 250 guns with Registration Numbers, ranging from 4987 thru 5236, purchased by the Kansas City, MO, Police Dept;