Overton & Co., 1848 Stampless Cover, Black Oval Company Handstamps Watertown, to New York City

Folded letter carried by Overton & Co.'s City Mail from Watertown to New York City, bearing the "Overton & Co. City Mail Office, 3 Broad Street" circular handstamp, dated July 3, 1848. The cover with toning along the horizontal file fold.