Dating columbia 78s
The Brunswick line of home phonographs were commercially successful.
Brunswick had a hit with their Ultona phonograph capable of playing Edison Disc Records, Pathé disc records, and standard lateral 78s.
The company first began producing phonographs in 1916, then began marketing their own line of records as an afterthought.
These first Brunswick records used the vertical cut system like Edison Disc Records, and were not sold in large numbers.
The parent company marketed them extensively, and within a few years Brunswick became one of America's "big three" record companies, along with Victor and Columbia Records.
Brunswick found it expedient and ultimately cheaper to contract with European companies (whose electrical recording systems were more reliable than Brunswick's) to fill their electrical classical catalogue.
Among the recordings Brunswick imported and issued under their own label were historic performances conducted by Hans Pfitzner and Richard Strauss—the latter conducting critically acclaimed performances of his symphonic poems Don Juan and Till Eulenspiegel's Merry Pranks, recorded in Berlin in 1929–30 by Deutsche Grammophon. Brunswick itself switched to a more conventional microphone recording process in 1927, with better results.
They were pressed into good quality shellac, although not as durable as that used by Victor.
In the spring of 1925 Brunswick introduced its own version of electrical recording (licensed from General Electric) using photoelectric cells, which Brunswick called the "light-ray process".The popular records, which used small performing groups, were difficult to make with the photoelectric cell process; symphony orchestra recording, however, exacerbated the problems of the "light-ray" system.