Hi Steve,
Yeah, I like the looks of these chips too.
Classic chips from the 1960s ... and are what I like collecting the most: the early classics.
As for being "slick" or "slippery" they're really not too bad.
They just have that smooth "broken in" look from table play, but actually stack fairly well.
Of course, I've never had enough to try stacking 30 of 'em!
Glad you're enjoying the posts.