She actually was an engraver for Browning. I am not positive if she ever engraved for Colt. I know that she does freelance work and also does engraving for Nutmeg Sports. She does very nice engraving work. I actually would love to have her do one of my guns. I am sure that Colt has commissioned her to do some work for them when a large order of special runs come in or some commemorative or some thing like the engraved samplers. As for years That I can only guess as in the 1980's and 1990's.