https://gamesx.com/wiki/doku.php?id=av:cbs_coleco
I've used this circuit in PAL consoles, not bad, works ok, easy to fit.
I did end up with a console at some point that had this circuit on a simple etched PCB, found it on ebay and i think it was made by a Turkish person, and cost ridiculous money for the few parts involved.
Console was modded for RGB, so it was removed.
I don't think I threw it out, must be here somewhere, but where, who knows.