Rex Records was a United States–based record label owned by the Rex Talking Machine Corporation of Wilmington, Delaware.
They issued vertical cut double-sided ten- and 12-inch diameter disc records compatible with the Pathé Records system.
They were bought out by Okeh Records.
[1] That article cites "1918 issues of 'Talking Machine World'" as a specific source for remarks about Rex Records.
This article about a United States record label is a stub.