ID Help - Aluminum Disc

[DigDeepNow]

Can anyone identify the 4 discs in the picture?

I find them at a relatively modern logging camp.

I believe they are aluminum and are slightly thinner than a dime. Minimally concave/convex.

The dime is for size comparison.  The disc themselves have TID's just below a dime.

Thanks

[JCR]

They look like galvanized knock out plugs from electrical junction boxes. Are they magnetic?

[DigDeepNow]

not magnetic and smaller than I remember the knock out plugs being

thanks

[sodbuster]

are the surfaces smooth, or is their a three dimensional surface on the faces?

 

[GB_Amateur]

I doubt the VDI would be slightly lower than a dime if they are more/less dime size and made of aluminum.

[DigDeepNow]

55 minutes ago, sodbuster said:

are the surfaces smooth, or is their a three dimensional surface on the faces?

 

not smooth

[Bob Sickler]

If they all are of the same diameter and exact surface indentation pattern, someone at the camp might have been thinking rudimentary "store token" if the camp was in use a long time. They could be thin aluminum planchets hammered with a crude or elementary design, inexpensive on purpose.

[DigDeepNow]

thanks for the help