If it's the radio I think it is, that's a real blast from the past (about 40 years old). There's
this one for sale on eBay. Do you know what range it is? I don't really remember, but the pic of the box suggests that the CTCSS was optional, too. I don't remember ever putting one on ham, but may not have tried, as I think I had synth radios by then, and the CP0520 was not built very well anyway. Not sure it was much better than the current crop of CCRs. I see a bunch of 460 xtals for it around here (anybody interested?), but nothing lower. Got charger and battery? I think they used the same battery as the Yaesu of that era. I'd go with something more modern (and synthesized).