I agree with the lads above.
Strange engraving though,eh? Kinda looks like Chequering or stippling,I am sure I have seen it on another Greener somewhere,perhaps in the Greener Book, I will look through mine & see if its there.
Make sure you get the Gun looked over, especially the tubes.
I don't think WW made any junk, even in the plain Grades,prolly a good solid Gun, if still in good order.Wood is pretty good for a low end
Good luck with it
Franc