Vintage Radio Service Manual -  MECK Model 5D7-WL18 AC-DC battery operated, Superheterdyne AM radio receiver. Manufactured by John Meck Industries, Inc., of Plymouth, IN. Dated 1947. 4 pages.  Original old Sams Photofact manual includes schematic, layout, alignment instructions, voltage & resistance test chart and repair parts list. This manual would make a sensational accompaniment to your retro audio equipment.