... I've had the first two $1 chips in my collection for years... the first chip
features thin print and a large "$1"... the second chip has thick print and a
medium "$1"... and yesterday I found the third chip which has thin print and
a really teeny "$1"... I wonder how many other variations there are?

I don't collect "ROT"-"LOT" variations, so I guess I'm just talking about size/
thickness of print and size of denomination.