Bertram operated in Brussels from 1883-91, publishing mainly popular works- songs and dances. It also published chamber music by Guillaume Meynne, violin works by Th. Herrmann and Bénoni Lagye, and piano music by Louis Gobbaerts (pseud. Straebbog).
Bertram's plate numbers were issued in a regular chronological fashion. Plate numbers are in the format of #### . Dates in italics are estimated.