Necklace with two removable pendants and removable mask ornament

necklace with large central pendant in the form of a turtle with an openwork smiling face on its shell; face opens to reveal a removable mask with frowning face, with top of face in silver and bottom of face in ivory; two large pendants flank central pendant--each in the form of a seal--one with an ivory head and a silver body, and one with a silver head and an ivory body; seal on right (ivory head) has removable round face pendant in ivory and openwork images of swimming seals and figure in a boat on body; seal on left (silver head) has a removable square ivory face pendant and has two ivory elements on body with stick figure hunter with a bow and arrow shooting at a caribou; PL side of necklace has square stylized metal masks alternating with round ivory faces--PR side of necklace has round silver stylized masks alternating with square ivory faces