What you are seeing is the top of the trademark and yes it is worn from the blade being opened and closed. The mark is upside down, see the attachment below for the proper orientation of the trademark.dcgm4 wrote:I think I can see a remnant of part of the symbol that wore away. It looks like it might be the end of the line that is perpendicular to the line that goes through the "S."
This trademark is from John Sellers in Sheffield England, the information on this maker can be found in Geoff Tweedale`s excellent book. The trademark was officially granted in 1838, they had a sales office in N.Y and his brother ran operations on this side of the pond.
This link has the info from Tweedale`s book if you don`t have a copy; http://strazors.com/index.php?id=449&do ... _sheffield_
If you look at the original ad I posted below you will see they manufactured "Fine Pen Knives, Razors, Surgeons` Instruments" among other things.
No doubt in my mind Sellers made the knife on contract for S. Jackson and probably even made the surgeons instruments he sold as well. Until I see more proof Jackson made his own knives I got to believe Sellers made them.
I love knife history!