You may be laughing now, but after the zombie apocalypse wipes out the grid and you are calculating cryptocurrency with pencil and paper, I'll be laughing (and cranking) all the way to the (probably by then barter-based) bank!
That is awesome. We have a bunch of these at the old Sulphide Train station here in Broken Hill. They are showing their age much more than yours. Good work @kyle I still don't even understand how they used them...