Awesome find! I had an ATK300FL... fretless version with lines in the late 90's. Selling that bass on eBay was the biggest mistake I've ever made with musical instruments. Wish I still had that one. I have an ATK305 pictured in profile pic... 2006 model, bought new in '07.
I had that same bass and also follishly parted ways with it. Also had a red sparkle ATK, circa 2010 ish(?) that I liked, but never really bonded with in a band setting. I was playing roots rock/americana style stuff and that is NOT the genre for that bass. Still,open to trying another one, it was really well built and sounded nice on its own.

Congratulations!
Pretty sure it was a '96 model.
my old bass gets my new sound, too