Going through my crystal books, I found Colony Crystal out of Romania, it shows the pattern is Napa. I went to Replacements , it actually has this listed twice once as Napa and then the Col1. I assume they made the pattern at two different times or replacements has it listed twice.
The original pattern to this was made by Fostoria, Colony which is actually Lancaster Colony.
The crystal is listed it as having been made in 1984-1986. I contacted their research Lancaster Colony purchased Fostoria in 1982 (others say 1983) and that Lancaster farmed out production to Europe. Prior to 1982(3) Fostoria did not outsource production to Europe.
Production in Romania occurred between 1984 and 1986 under Lancaster ownership.
I did find another site that said several years after the factory closed in 1986, Lancaster contracted with Viking to produce selected pieces of the American pattern and this continued until 1998. They said all ruby American is of this later production.
If your Mother got these in 1937 they were produced by Fostoria.
Being produced by Fostoria they will be much more expensive then being produced in the 80's by Lancaster Colony.
Do you still want these valued? If so are you sending the pictures of each glass?