Not at all, your gun was assigned the post-1913 factory designation "Trap Grade"; the unusual pre-1913 Grade 3E I referred to is factory grade stamped "3E". Who knows why the original purchaser of your gun specified the pre-1913 Grade 3 engraving pattern, but it was available and I assume it was a design he preferred over the cataloged Trap Grade engraving pattern. No one can explain all the grading mysteries surrounding L.C. Smith guns. As an example consider the photos below; a 16-bore engraved in a high-grade style and pattern, but is identified by the grade assignment in the shipping records and atop the barrel as an Ideal Grade. Guns like yours are quite desirable in my opinion; and yours could be a one-off? Most likely you'll never know the reasons behind the engraving pattern; so enjoy being its caretaker, and many thanks for sharing.