I was able to pick this card up not to long ago and believe it may be a new discovery. It comes from a very obscure athletes issue probably from the period of 1913-1914. The issue focuses on the accomplishments from the 1912 Olympics for most of the subjects that are on the known checklist. It is also interesting to note that the Capitol Candy & Cracker Co also had direct ties with the Pacific Coast Biscuit Co. So yes, I believe unknown cards are still out there...
