Mystery Game Disks

Hello there!  Got a mystery on my hands.

  A number of years ago at a garage sale, I picked up a shoebox full of "A Million Tiddly Winks".  (Not actually a million, but quite a few...)  I have been calling them "Game Disks".  The guy I bought them from said he got them from someone else, and had no idea what they were.

Sorry about the fuzziness of the pics...couldn't get my camera to focus on the details.

They are made of a soft plastic about 3/4" across.  In seven colors: Yellow, Orange, Black, White, Green, Red, and Blue. They all have a number molded into the front side (ranges from 1 to 16), and the back side has either concentric rings or is simply blank.

 

A detail pic to show both sides.

Another detail pic with a ruler to show size.

And finally a pic with some of the disks used as bases for some of my Galoob Micromachine Figures.






Final thoughts: They seem to be from some kind of board game or game set.  It occurs to me that they could be some kind of industrial washers or spacers...But what would the numbers be for then?  Strange.

Has anyone ever seen anything like these?  Who made them?  What kind of game are they from?  Or what was their original purpose?

Thanks for any ideas.