Off-Board Artillery Marker Base

I needed a means to remind myself during games that I had artillery available off the gaming board. It can fit up to a 15mm scale miniature, and has a recess to hold a d6 up to 12mm in size. This way you will know what artillery type is a available (the miniature), and how many guns/tubes (the d6) that are associated with that off table asset.

In the provided pictures, the FV432(m) is 10mm scale, and the M109 is 15mm.