"Paid" in oval and "5" handstamps on paper with blue ruled lines, tied by black "Unionville SC Jun 12" datestamp to 1861 cover to Mt. Tabor, South Carolina, light contemporary gum staining around stamp, otherwise very fine, only four covers with the Unionville provisional are known, this being the only single tied by a datestamp (a pair of stamps on a patriotic cover is also tied), an extraordinary and rare cover, 2022 Civil War Philatelic Society certificate (Scott unpriced tied, $17,500 for uncanceled)
Provenance: Sidney A. Hessel (H.R. Harmer Sale 2291, 1975)