1960s vintage Kay bass guitar 5935 This guitar is in amazing condition and still works perfect! I am not totally sure on how to date this guitar but the serial number is 2409. There is some obvious patina from age but that just adds personality. The original case got thrown away but it will have a new hard case that comes with it. If you have any questions feel free to send me a message and I will answer it as soon as possible. Thanks for looking!