here's its present correspondin' item http://www.ariaguitars.com/english/products/stb-jb http://www.ariaguitars.com/english/products/stb-jb-dx
it's been awhile since Aria had to change headstock, which originally looked very Fender "Aerodynish", Legend logo apart...
If it's the first, you'll have Vol/Vol/Tone. If the second, you'll have Vol/Bal/Treb/Bass.
other than poor electronic, a well crafted bass, as always Aria.
Given the horrible state of maintenance, and the cruelty to dive screws back in it, you should talk it down a lot. then a good setup and cleanup and it'll be in regular operatin' order