New York N.Y., 5c Black, "AC M", "ACM" Initials (9X1a-9X1). Positions 34-35, horizontal pair, the left stamp signed "AC M", right stamp signed "ACM", large even margins all around, single blue penstroke cancel leaves entire design and signatures clearly visible

EXTREMELY FINE. AN EXCEEDINGLY RARE MULTIPLE COMBINING TWO DIFFERENT STYLES OF THE "ACM" SIGNATURE, WITH FOUR LARGE MARGINS, IN SOUND CONDITION AND WITH A LIGHT CANCEL. THIS IS EASILY THE FINEST WE HAVE EVER ENCOUNTERED.

According to the Piller book, shortly after the stamps were issued, the postmaster apparently felt it necessary to initial or validate the stamps. Several different signature were used, including "ACM" for Alonzo Castle Monson, brother-in-law of postmaster Robert H. Morris. Three styles of "ACM" signature are known, including all letters connected (Scott 9X1), the "A" and "C" connected (Scott 9X1a), and with periods between all letters (Scott 9X1b). The first two are the most frequently encountered. Multiples containing more than one signature type are extremely rare, especially in such choice condition.

With 2004 P.F. certificate

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