Hi 101Volts.
The bass is essentially a Kay model K5922 made between 1966-68.
I don't think this one was sold as a Kay. According to Kay catalogs, the Kay version was only produced in orange, white or blue. I'm not sure what that bit of logo (?) is on the headstock but it's not Kay.
Kay was supplying Silvertones and Airlines during this period so I have taken a look at these catalogs as well. I find nothing close to your guitar in the Sears catalogs although I don't have a full set. There is a bass in a Wards catalog that shares characteristics with yours but isn't a perfect match.
Here's what I see:
Kay K5922
1968 Airline:
As you can see, the body on your bass matches the K5922 except for the color, but the neck+tuners looks more like the Airline. So I'm confident you bass was made by Kay, but for a different distributor.