I just put the 1996 stackable Happy Holidays set from Opera House Casino up on Ebay. It is the only stackable set that I have, that I can remember. Yes, one of the chips is opposite the other two as far as the logo side versus the design side. One of the three chips in this set has a design on both sides - the New Years has the 1996 Old Man going out and the other side has the 1997 Baby coming in. But the other two chips are opposite from each other.
Thanks--Alan.