Both the Ludwig Drum Company and their competitors elaborated upon Gladstone's design and produced a diversity of hand-held cymbals, including the bock-a-da-bock.
The bock-a-da-bock is listed as a product of the Ludwig Drum Company in their 1928 catalog.
[1] The bock-a-da-bock is typically played in a pair like castanets, with one set of cymbals in each hand.
[1] Due to recording limitations in the 1920s, the bock-a-da-bock was sometimes used as a substitute for a trap kit.
[2] Noteworthy players of the bock-a-da-bock are Kaiser Marshall, who played it on several Fletcher Henderson records, and Zutty Singleton from Louis Armstrong's Hot Five who played a bock-a-da-bock on Armstrong's 1928 recording of "Sugar Foot Strut" (featured prominently in the introduction and ending) and "West End Blues".