Stable lead isotope ratios were determined on 64 samples taken from 60 of the Buddhist bronze images which were examined and chemically analyzed here. The data were grouped using multivariate techniques and were compared with an accumulated database of lead isotope measurements on more than 700 ancient Chinese artifacts and more than 200 Chinese and Korean ores. One group of 10 images which were all datable to a period of less than one century, Eastern Wei through Sui dynasties, form a nearly unique isotopic group which coincides only with an unusual group of Lengshuichong bronze drums. A second large group of 32 isotopically matching images contains almost all, 15 out of 16, of the images attributed to the Northern Wei dynasty. The remaining members of this group are of later date, extending into the Tang dynasty, or are animal figures attributed more generally to the Six Dynasties. This group partially overlaps somewhat the isotope fields of some Western and Eastern Han mirrors and some of the Sackler ritual bronze vessels of the Shang and Zhou dynasties, but appears to have been derived from a different ore source. The remaining specimens break up into some very tentatively defined small groups of two to four specimens each, and a small residue of four unique, unmatched specimens.