Signed vintage gold filled shell cameo pendant + costume chain

I am grateful to this website: https://nasvete.com/, which has information on many vintage jewelry designers. This is the information I found on the site about Amsel, the maker of this lovely cameo pendant: "The history of the Canadian jewelry brand Amsel began in 1962 and lasted just over a decade. The company was mentioned in business directories of Québec silver jewelry manufacturers in 1963, 1967 and 1973.The Amsel Bros Company, located at 4372 blvd. St-Laurent, Montreal, handcrafted silver, gold and metal items. A characteristic feature of this brand’s jewelry is its fine filigree work and high quality workmanship." The pendant measures about 1-1/3 X 1 inch. The shell cameo is carefully carved, left facing (less common than right facing) and set in a classic four-prong frame. Marked Amsel G.F. (for gold filled). This piece is in excellent condition and comes with an unmarked gold tone chain about 23" long.