Currently, I'm working on a piece about Cowboy Slim Dortch for the upcoming issue of the "American Music Magazine." I have several 45rpm records in my collection that have "Phillips OSM" plus matrix number etched (or stamped) into the dead wax, including a record by Dortch and a Do-Ra-Me record by the Dixieland Drifters. The Dortch tracks were likely recorded in Memphis with Travis Wammack on guitar, the Dixieland Drifters songs in Nashville. I believe it was a Nashville plant that pressed those records, can someone conform this?
Also, any additional info on Dortch is highly appreciated!