These opalescent trocus shell bracelets are from Eastern Papua New Guinea, either West New Britain or the Siassi Islands. There are five rings of the highly prized shell in each bracelet, bound by plaited strips of cotton fabric. Originally, these would have been bound with fiber, but the red cotton is admired for its color. The incised markings on each ring add a striking graphic layer to the bracelets. The smaller, more spotted group has an interior circumference of 9.5” while the larger measures 10.25”. Early 20th century. #2611 and #2612.  $600 each