1957/58 DeSoto Car Radio Automatic model DET-28 Service Manual. This is an original Sams folder, not a reprint, for a 1957/58 DeSoto car radio model DET-28 made by Automatic. Sams #426, folder 6. The date of manual is 1-59. This is shipped in large envelope so as not to bend the material, with a tracking number provided. No overseas shipping.