Lot
4520 
(Cleveland & Toledo Railroad) Cleveland & Toledo R.R. '20' Mar 27, lovely strike of bold route agent cds on small cover to Cleveland with original enclosure datelined "March 27, 1856", Extremely Fine and rare. Towle No. SP-2 Estimate $500 - 750.
Towle states, "About 3 examples of this unusual item have been recorded. It is most likely a railroad company business mail marking - in this case improperly used. The meaning of the distinctive "20" has not been determined." .