Source: Laws Of The Commonwealth Of Pennsylvania, published in 1797
This is an example of a wire watermark. It consists of the letter "W".
Additional Book Information
Laws Of The Commonwealth Of Pennsylvania. Volume I, From The Fourteenth Day Of October, One Thousand Seven Hundred, To The First Day Of October, One Thousand Seven Hundred And Eighty-One. Republished, Under The Authority Of The Legislature, By Alexander James Dallas, Philadelphia. 1797