1 Is transparent, easily formed and most suitable for window glass (see flat glass). 2  It has a high thermal expansion and poor resistance to heat (500â600 Â°C). 3  It is used for windows, some low temperature incandescent light bulbs, and tableware.
Carson City Mint. The Carson City Mint was a branch of the United States Mint in Carson City, Nevada. It primarily minted low numbers of silver coins; however, gold was also minted in greater numbers. The mint was in operation for about 19 years.
Outside the Burnished Uncirculated coins which have a W mint mark, all Uncirculated American Eagle Silver coins have never had a mint mark. From 1986-1988, Uncirculated Silver Eagles were minted at the Philadelphia facility. From 1999-2000, they were produced in both Philadelphia and West Point.