Two Southwest necklaces, 20th century. A Navajo sq

Two Southwest necklaces, 20th century. A Navajo squash blossom necklace constructed of silver with a sandcast naja of classic form with two hands at the terminals; A Navajo squash blossom necklace constructed of silver with a sandcast double crescent-shaped naja with tabs at the terminals; 15 ¼ inches length (including pendant); 15 inches length (including pendant)