OK. This is the computer that started it all for me. (Well, a rather poor picture of the actual machine...)
As you can see, it isn't in original condition. There are a few mods and, unfortunately, the processor is missing! I think I put it in someone's ZX81 some years ago. I'm sure I have another somewhere under all this junk...
Note that I never did build the RF modulator shown on the circuit diagram. After the first batch or so of machines were produced NASCOM started to include a ready-built, screened Astec unit which is fitted to the underside of my PCB.
nascom.info