Very nice collection of chips.

I believe that most of these are very early chips made by the Burt Co. I think only the Burt company made and sold chips with the metal die cut inlays.

A couple of years ago Robert Denbow wrote an article in the club magazine about the early history of the Burt Company, and the chips they made. You might want to look up that article, as some of your chips are pictured in that article. In the 1930s and early 1940s Burt made only two types of chips, and on both they sometimes used those metal inlays.

One type was "smoothies" (smooth surface, round edges). The first three chips on the first row are "smoothies". They also made interlocking plastic chips in the 1930s, similar to those you can still buy in a drug store today. They were unique in being able to apply a metal inlay to the plastic chip. I think that they gave up on the metal die cut inlay process by the late 1940s.