These two chips are the same, a shamrock on one side & 99 on the other side. I scanned to show both sides. I say 99 instead of 66 because when viewing the shamrock right side up on the red chip and turning the chip along a horizontal axis the numbers appers as 99. When viewing the yellow chip in this manner and turning it the "tails" of the 99 face right. Small key mold if you can't make it out in the scan. Anyone have any ideas?

Dave Smith, Snowbound in New Hampshire
"LIVE FREE OR DIE"