String of approx. 800 clam shell beads. Pomo Clam Disk money. Found during 2014 inventory. These beads were determined be to pre-19th century based upon method of manufacture and the way that they are strung: Holes drilled at a slant, indicating hand drilling. Rounding of beads are imperfect, indicating hand formation. Strung by size, traditional to Pomo to indicate value