Solve the Mystery of The Maker of This Piece, and Win a Prize!

Another mystery piece and mark, at least to me! Perhaps I've overlooked something obvious about this crested silver cream ladle, circa 1810-25, but I am assuming it to be American coin silver, probably from the New England region. However, I've had no luck tracking down a potential maker, despite a good maker's mark with relatively uncommon initials. The maker's mark is a crude "SL", indicating perhaps more provincial or small-town manufacture, though this is not dispositive. This piece measures about six inches in length and weighs about 22 grams. It has squared shoulders and no drop, and the engraved armorial is done well, but not as well as would typically be seen in a very large city. What do you think?

The person who can provide a definitive, or very strong, attribution for this piece will receive either a good-quality American coin silver spoon as a prize, or 10% off their next order from me, up to a value of $20. Fingers crossed someone out there can get me on track on this one!