I am selling 22 ORIGINAL National cash register KEYS.NOS. New Old Stock They either say :NATIONAL or THE NATL CASH REGISTER COMPANY DAYTON, OHIO U.S.A.They all have the letter M after the number except 389N and 397N.373, 374, 375, 376, 377, 378, 379, 380, 381, 383, 384, 386, 387 , 388, 389, 390, 391, 393, 384, 395, 396, 397 Too many keys to clean.ALL ORIGINAL KEYS in original u used condition. Ask questions before bidding please not after.Read my feedback and look at my other Ebay auct...ions.