I've just opened mine up, and it looks nothing like that. It's an XO series, I guess. I bought it new, a couple of years ago.
I was hoping to tap into the pure square wave outputs of the 4013 - there's the one that's actually used, and the one an octave above that, that just feeds the second one. Only the NOT Q outputs are in use, according to the schematic, so there should also be the option of using the Q outputs - 180 degrees out of phase.
Unfortunately, it looks like I can't get it apart without damaging the three knobs, and the side of the PCB I can see, only has connections for the pots, jacks and switches, some capacitors, a diode and what appears to be a transistor (K30A GR0H), and some via points.
Possibly all I can realistically do is poke around with an oscilloscope, to see if I can pick up the second NOT Q signal from the 4013, or something close to it, before it feeds into the rest of the circuit. I won't be able to get to the first stage, or the unused Q output pins, unless I can get it apart.
The alloy case has Made In China moulded into the inside.
The PCB has "EC-D19rB" marked on it, near the Direct Out socket.
Behind the High Filter pot, there are pads labelled GS1 Ground Spring, with holes that the spring presumably should fit into, to connect those pads to the metal case - there is no spring. Maybe I should make one?
You have to take the back off to change the battery, of course. I've removed the one that was in there because it's been there for a while now, and might start to rot. It could easily never get another one.
The pots, jacks and switches, are all mounted on the PCB. The PCB shows no indication of 0.1" spaced chip legs, so it's presumably all surface mount, on the other side.
I can't get the PCB out without removing the knobs, which may well be glued on (after unscrewing the bits that secure the jacks) . I can't pull them off and they are hollow moulded plastic, so I'd damage them trying to lever them off.