Well, this afternoon I opened up some of these old orange box down in the corner of my basement and found this 6 digit led clock. It's a bare bone unit without case. It was my first electronic project back to the late seventies. I recall at the time these non stopping advancing seconds display was such attraction to me. I want to restore it to a working unit. Looking at my old clock I realize that it has no power supply and no IC.It has a 24 pin IC socket on the circuit board. I must have misplaced the IC somewhere. I wish if someone can lend a helping hand identifying what IC was used in this seven segment clock. I think it might be a TexasInstrument IC but I am just guessing. There are no timer no crystal but transistors,resistors capacitors and diodes. The board has "Quest" printed on it.