L.B. Richardson - Athol MA.
L.B. Richarson evidently was a contract shop and exactly what products they produced is unclear. The museum acquired a set of hand made steel stamps marked with the company name and 1852. The stamps were perhaps made in house for general stamping use, as stamps are not noted to be one of there products. There is documentation that L.S. Starrett, founder of Starrett Tool served his apprenticeship under Richardson and used Richarson's shop to produce his patented Combination Squares. These are an excellent example of hand made figure stamps.
For more information on the company history: C.F. & L.B. Richarson
For information on a method for hand making of Steel Stamp figures: Hand Made Steel Stamp Method