Old London silver, its history, its makers and its marks (1903)
Howard, Montague · New York : Scribner · leaf 118
No. 47 (1794) SALTS 89 … No. 48 (18I5j Concerning the position of the hall-marks on salts, no rulecan be given for the early ones, but for the last one hun-dred and fifty years the marks have generally been placedon the bottom.
Plate, English · Silverwork · Hallmarks
Internet Archive · Getty Research Institute · Public Domain Mark 1.0. Free to use for anything.