American silver dessert spoons, "JS" unknown

Here is an inigma. They are 7 7/8" long, are pointed end, with a back midrib and no drop or shoulders. So I guess they are around 1805. I thought they might be Joel Sayre, but the JS look very close to the first letters of Jehu Scott's mark. They are substantial and in good condition, a few bowl dents but otherwise good.