Offered for sale is a 6 ¾-inch-tall medicine embossed with “S.O. / Richardson's // Bitters // South / Reading // Mass.” Bottle has been nicely tumbled.  It has a square-collar applied top, nice bluish-aqua color, and an unusual base. Looks like a post mold mark over a hinge mold, or perhaps this is some kind of pontil.  You be the judge! There are no chips, cracks, or bruises, and only a few light scratches.  Glass is clean and embossing is strong.  A beautiful specimen!  Please check all photos before purchasing.  I offer a full, money back guarantee including freight on everything I sell if you think it isn’t as described.  Please click on “See other items” to check out everything else I sell.