Released in 1902 by Inland. An all-caps Condensed followed in 1905. [Reichardt] Appears to be based on Inland’s Gothic No. 8.
Also adapted by Lanston Monotype, and cast by Bauer (as Astoria, 1911), Klinkhardt (Ideal-Grotesk umzogen, before 1920), Reggiani (Serie Fedora), Fondografica (Garda). [Reichardt]
The typeface is possibly named after the Comstock Lode, which became famous for the Silver Rush of America’s West. The word “comstock” was later used as a common name for an offset outline style.