Extremely Rare Sideshow Freak Photo Skeleton Man Possibly OOAK Eisenmann Test Shot CDV

Original CDV of a thin / skeleton man.. a well-known Victorian Era sideshow performer. Possibly an extremely rare, even one-of-a-kind photo... I picked up a decent sized collection of these sideshow people images and quite a few were on this pink mount with blank backs.... a note that was with the collection said that many were TEST SHOTS for the famous photographer Eisenmann. I was not able to find another example of this same photo online.CDV is 4" x 2.5" with blank back. It is in very good condition overall, as shown.