I am seeking information regarding the chips in the attached photo

The are from the Lookout House in Ft Wright Ky

I got these in 1958 when I was part of the crew working on reopening the Lookout House under the auspices of the Knights of Columbus

I believe these chips are brass. They are about 1/16th in thick. The 50 is 1.25 in, the 25 is 1 in

I have 9 of the 50 denomination and 4 of the 25 denomination. They are the same on both sides

I have not attempted any cleaning

Thanks

Jerry Dunn