I found this in July 2008 and it has a $486.99 market value.
Here's a link to a single pickup version of a Kay Sizzler although the publisher mistakenly calls it a Star King. http://seawebmedia.com/html/kay_star_king.html
I did a little more research and the Kay Sizzler was produced from 1956-1958 (which matches the Kluson tuner dates) in a brown or black Zolotone finish. The single pickup model was the K4140 and the dual pickup model was the K4144.
Here's a video of Tony Gilkyson who used to be in the Los Angeles band X playing a vintage Kay Sizzler.
Paul, a reader of this blog, sent me this picture of his single pickup Kay Sizzler. He picked it up in Abilene TX for only $60.00 in the mid to late 80's.