Early 1800s. Made entirely of natural materials and probably pre-contact. 2 5/8" diameter. Coil work, lipped domed form. The outer edge (lip) with blue dyed fiber thread. The balance of fine porcupine quill covered coils, with blue center and four clan marks at the quarter points Used on hair pipe breastplates, singly or in pairs and rarely, three. Most often, they were made of shell from the Pacific, acquired through trade. Porcupine quill examples are rarer. The American porcupine in adaptations is found throughout the continent from Alaska to Mexico and coast to coast. This example is sound and complete in well used condition with some wear as shown.