Initials are J W. If you look in front of the “J”, you will see the faint remains of the same line that you can see behind the “W”. The designs in front of and behind the initials are identical.
I think I agree: Though I don't see a line to the left of the J (just being honest), the line, L or G or whatever doesn't seem to be made the same way (different hand and/or tool?) as the J*W* and is not followed clearly by the same dot...
383 on the muzzle is interesting, as one group of dots left of the J seems to form a 3 if I squint
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On the other hand, there is a James (?) Lewis listed in Noble working in North Carolina and Carter County, TN.
Another Lewis gun with similar decorations is compelling.