I am looking for information on a Jacob Daub who was born c.a. 1740 in Upper Salford Township, Philadelphia (now Montgomery) County, PA. I believe that he is the Jacob Daub who was listed on the tax records for Upper Salford Twp. from 1779-1783 as a gunsmith. There are several very well made longrifles signed by him - also Jacob Doub (sic) Jr. The rifles were made in the 1790-1810 period.