Thanks Jawjadwag, that is my tutorial and my guns showing the different features.
The last Syracuse hammerless gun I have recorded is 23,553. This gun has L.C. Smith Maker Syracuse, N.Y. on the top of the barrels. There are some before this that do not have a makers name on them and it is my belief that some of these guns were put together after John Hunter bought L.C. Smith. They were either assembled in Syracuse or Fulton and because now owned by Hunter did not put the Syracuse engraving on the barrels.
Serial numbers starting at 24,000 were Syracuse hammer guns, and hammerless guns do not show up again until serial number 30,000 (30028 in my records). These guns had no makers name on the barrels but still had the fine checkering (22-24 lpi), vase shaped ebony tip. They were Quality 2 guns and some had no engraving but still Quality 2.