Looking to ever improve the quality of the hardware finish on my Sound King, I found this strainer on Ebay. Finish looks pretty good, but the hole in the adjustment knob on the strainer looks wrong from everything I know (limited at best). I checked the catalog scans on this site and no listed year shows a Zoomatic strainer with anything but a solid knob.
I will stop watching it if it is a replacement or makeshift knob.
Thanks very much.