Given to me as a gift, purchased from a Value Village thrift store on September 1st, 2022. According to the date code this calculator was manufactured in August of 2006 by Nam Tai in China. Looking inside you can see printed on the PCB "GARGOYLE Rev 0.4-2 DEC.26 2005". Looking at the other TI-83 plus calculators I have, I've never seen any revision number or name printed on a calculator. Currently in working condition.