The above answer on Worley is likely correct. The typeface style looks like Worley, Jess, or John. Wyomissing Creek, Mohnton, PA. At one point (1830s), Worley sold out to Cornelius Reichwine, who was more of an entrepreneur than a barrel maker, so you will see this "W" combined with Reichweins's name also. This combination usually signifies that "W" (or any other single initial) actually crafted the barrel for the Reichwine factory. If you remove the barrel you might see Reichwines name or some other factory name of the many gun barrel factories on the creek.
Surprisingly, a part of the original stone Worley Factory, with an added wood structure to make a garage, still stands on Wyomissing Avenue, Mohnton.
Patrick Hornberger