3 Brass discs. I was told there were made (sold) by Celestron.
I don't know the original function of these discs. Were these an early version of anti-vibration pads? Were designed to made to protect nice floors? --or maybe just add general stability.
Asking price $60 or best offer. Price does not include the quarter which is there for a size comparision, but I'll throw in the quarter for $61
Buyer pays actual shipping. These are solid brass, so figure it will be a several dollars at least.