~~~ one more boxed, 3-pc. set were unmarked .999 fine in about 1970.

They were advertised in the WSJ and, though I did not buy (I thought the price was a wee bit too high above spot ), I later read they actually were .999. One casino; Mondorf-les-Bains / Casino 2000, had 1000 fine token minted that were incused on the edge as 1000 fine.... I was told by a pointholder there are Slipper errors that got out before walk through (HH) that are still in Miami, somewhere without .999.