I have to agree that the engraving, even to my inexpert eye, shows ample evidence of being very poor quality. Straight lines that aren't straight and that aren't of consistent depth or width, curved lines that aren't smoothly curved, features that should be identical that vary considerably in appearance, and that's just a start.
Maybe the engraver has a devoted following. If you can find someone who really likes his work and they will accept the provenance you have, they might pay a premium for it.
impalacustom is correct. The engraving on the right side of the receiver is of Justice, not Lady Liberty.