Vintage 14K or 12K gold filled Modernist brooch w natural green jadeite jade

Vintage handmade Modernist Mid-Century Modern (MCM) brooch pin. With natural deep green jadeite jade stone of good quality. Signed AMSEL GF. GF means that it is filled with real 14 karat gold (or sometimes 12 karat gold) and contains much more gold than plated jewelry. 5.3 cm long. Slight wear on the left side edge, as pictured. Otherwise in very good condition.