If I can be allowed to continue on DCI or DIE CUT INLAID chips, the post earlier was the best I could do at lunch break at work.

There are two types of Die Cut Inlaid chips other than the type of material, color used for the inlay, or the edge being round or square. The two types are:
1) Die Cut Inlaid-> were the inlay itself forms the design or letters and
2) Reverse Die Cut were the clay color of the chip forms the design or letters.
I used the Seymour Coded Antique Chip picture from Bill's post and IDed them DCI or RDC and I am sure you can get the idea.

Here are a few DCI chips that were special ordered for club use:

Here are a few Reverse Die Cut chips that were special ordered for club use:

Now here is the FUN PART. Most Die Cut Inlaid chips and Crest & Seal chips were made by US Playing Card Company. Click on the link below and then click on the letters that are on the DCI chips to see a picture of the chip, where it was delivered, and the year it was made!
http://chipguide.themogh.org/cg_uspc_list.php
How Cool is That?