Monaco. Four piece Silver Essai Piedfort (double thick) Specimen Set, 1950. KM-PE6,7,8, and 9. Consists of 10 Francs (7.5 grams), 20 Francs (12.8 grams), 50 Francs (19.8 grams), and 100 Francs (28.9 grams). Mintage 450 of each denomination. All coins marked "ESSAI", nicely toned. The set in its plush velvet lined case of issue. Choice Proof-Like Brilliant Uncirculated. Estimate Value $400 - 500