I have been collecting chips for about 6 years and as I am selling a lot of my collection, I have the red rectangular boxes I bought from JP's Corner that house 21 39mm square tube chip holders. They are used but almost new in condition.
The red boxes have some writing on the outside, but they are in good shape.
If anyone is interested, I am looking to sell them for $6.00 each, including the 21 square chip holders inside.
I will have to check on shipping, but if you are interested, email me and we can work out the details.
Deb