You first asked about Columbian coin glass. The Columbian pieces were produced in 1892 – 1893 for the Columbian Expo in Chicago. As far as we know none of these were reproduced.

When recently attempting to buy a small collection of Coin Glass, I called the author for more information, only to reach his son. The family still has his massive collection of Coin Glass, and they are attempting to sell it. Based on eBay sale prices realized, to me they appear to be optimistic on the price. But, they have a number of rare pieces, and the grouping might be of interest to the right collector.