I don't think they're Bud Jones because they are of European origin. So my guess would either be Bourgogne et Grasset or Abbiati. High quality injection mold plastic chip, with a metal disc for added weight. I would think that the chip weight would be slightly more than 10g each and probably uniform. There seems to be quite a lot of fading, which means they've encountered quite heavy use and/or very prolonged exposure to UV/sunlight.