you can tell one from the wear also but it would be hard to tell from a pic. They sold them to anyone with money! I would not be surprised if it wasn't used for cake decorating many years ago. I have a few but not a good pic of any of them. The catalog is a 1880's-90's one with fancy handles! Sand trowels would be used on larger castings to smooth sand in the mold. The slicking spoons are for smaller and detail areas, those are more common.
added another page of that catalog