I have the same chassis in my Cosmic Aliens Cocktail, I have an issue that that adjustable inductor that is marked up as Horizontal Sync has failed, the core fell apart (I have another that fits so may get lucky on that) but it turns out that it has two sets of windings in it, a common pin and two pins with wires and a fourth with looks to just be for stabilisation nothing soldered to it, one set is open circuit so the I am getting no oscillation and the chassis is dead, trying to find schems to see if I can find a donor chassis to take the inductor from. Did a little bit of reverse engineering and it looks like it is part of the hartman type oscillator circuit,