VERY FINE EXAMPLE OF THE 5-CENT 1847 "MOWER SHIFT" -- DOUBLE TRANSFER TYPE E -- ON A COVER.
The so-called "Mower Shift" is named after its discoverer, the San Francisco dealer R. H. Mower. In an article discussing this rare position in the November 1976 Chronicle, Duane Garrett quotes a letter from Stanley B. Ashbrook, which states "this 'E' variety is quite scarce, much more than either the 'A' or 'B', probably due to the fact that the extra lines were not cut very deep on the plate and soon wore away. I believe that we can only find the 'E' among the very earliest prints from the plate."
With 2014 P.F. certificate