Sem Agency, May 12th 1830 (Florida territory). Manuscript postmark at left (type V) with matching "37½" double rate on folded letter sheet to Florida Governor Duval in Tallahassee, docketed "Election return from Tampa Bay, for representatives in the legislative council", Very Fine, an extremely rare manuscript postmark from Seminole Agency, only one other postmark type known in archives. Estimate  $500 - 750. $0 (Image)