This was taken from John Houchins book on LC Smiths The Legend Lives. AE Spangler, Wilton Spangler(1880-1904)also engraved for Baker and Lefever, Jacob Glahn also worked for Sharp's , Winchester and Colt and also engraved some bank notes and his sons George Theodore and Gus(1880-1905, Frank Mason,he became the head of the engraving dept at Baker Gun and Forging Co(1890-1895), Albert E Krause(1890-1945), Charles Jerred and Oliver Wardhough(1947-1950).
Elliot briefly mentions Jacob Glahn and possibly his sons; A.E. Spangler and perhaps his brother Wilton; L. Delunsch; R.A. Arthur; possibly Frank Mason and sons Roy and Max; and R. Kornbrath
The following is from the 1887-88 Syracuse city directory. This was a period when Lefever had approximately 80 employees. Please note, that most of these men were living in boarding houses. Their addresses often changed yearly.
The Syracuse directory, which sometimes contains occupation shows approximately 20 engravers from year to year in the late 1880's. Hard to imagine they were all employeed by Lefever.
Jacob Glahn shows a business address, which may not be the Lefever factory, but I am not 100% on that.
Jacob Glahn
Business Address: 110 south Clinton
Home Address: Kennedy n. south Onondaga
Augustus Glahn
Home Address: boards Kennedy n. south Onondaga
George J. Glahn
Home Address: Cortland avenue. n. W. Castle
Theodore Glahn
Home Address: 188 Lodi
Milton C. Spangler
Home Address: boards 113 Townsend
Albert E. Spangler
Home Address: 415 Prospect avenue