New Orleans Ex. Sta., La./Recd./Jan. 19 (1886). Cds backstamp (Bomar NO86-02) on 2¢ Postal entire from San Francisco addressed to the "Commissioner for Cal., N.C. & S.A. Exposition", Extremely Fine, a very rare marking of which only 5 other examples are recorded, this being the earliest known usage. Estimate  $400 - 600. $0 (Image)