Here are some dupes from my sample collection. Would like to trade for others I don't have, or will sell for $4 each. The oversize 'hamburger' chip and the serialized metal core chip in the top row would be more.

By the way, the orange chip is a Matsui sample roulette (Japan). It has no maker's name on it.

The black Paul-son with inserts is a new acquisition that I hadn't seen before.

The Langworthy chips come in lots of varieties; note the number and color of the edge spots in addition to the base chip color.