Newton's First Edition (1687) Principia Census

We are preparing a new census of extant copies of the first edition Isaac Newton's Philosophiae Naturalis Principia Mathematica (1687). We seek information on any copies that are/were owned either by private collectors or located in obscure places (little known libraries not integrated into Worldcat, ESTC, KVK, etc)?  If you have any questions or suggestions, please contact us directly.
With many thanks in advance and our very best wishes,

Mordechai Feingold (California Institute of Technology) feingold@hss.caltech.edu
Andrej Svorencik (University of Amsterdam) a.svorencik@uva.nl