Wolfe wrote:Excepting Edison Diamond Discs and Pathé discs, the major exceptions, most records are lateral cut.
Pathé NEEDLE CUT records (introduced ca. 1920) are also lateral.
You may find minor oddball exceptions here and there, but it's likely that if it's vertical cut, it'll indicate somewhere on the label or sleeve, most disc gramophones only being equipped for lateral cut discs anyway.
Victor, Columbia, Brunswick, Decca, etc. are always lateral.
Not always. Brunswick began recording vertical discs in 1916, but these pre-lateral discs are very scarce. Their first lateral recordings were made circa September 1919 with the first releases issued in January 1920.
The main reason labels that began operations in the WWI era started out producing vertical product was to avoid infringing the patents on lateral cutting then held by Victor and Columbia. Victor Emerson (late of Columbia) started his recording operation in 1916 initially employing a technique that engraved the sound waves at a 45 degree angle, halfway between lateral and vertical (rather like unto recording a mono signal onto one channel of a modern stereo record groove). These were advertised as 'the only record that will play on Victor and Columbia machines without the use of an attachment'. After the lateral patents expired Emerson began producing regular lateral discs.
Other well-known labels who started out making vertical discs before they went to laterals include:
Gennett (verticals from c. October 1917, laterals from April 1919)
Grey Gull (verticals and laterals from c. 1919/1920, laterals only after 1921)
Okeh (verticals from c. June 1918, laterals from c. July 1919)
Paramount (verticals from c. 1917, laterals from late 1919)