The etch shown is Kashmir which will also be found on blank #5099. The 4020 stemware with this etch is always crystal with a green foot. While the 5099 stemware is always either azure or topaz.
Thirteen different sizes of stemware were offered in the 4020 line.
The Kashmir etch was offered on different dinnerware blanks depending on the color produced. the Fairfax blank was made in azure and topaz while the Mayfair blank was made in green.