Poli Currency Mat
Huon Peninsula, Morobe Province, New Guinea
20th century
Natural fiber and dyes, Nassa shells sewn onto woven mat
11.5 x 9 inches  (29 x 23 cm) when folded as shown in photos, it has two sides

These currency mats could be worn as body ornaments on specific ceremonies, worn around the neck
or as ceremonial payment such as for "bride price"