WTIM-AM was an MOR station licensed to Taylorville, Illinois. They first went on the air in 1952 followed by WTIM-FM in 1969 which carried a Beautiful Music format. 92.7 FM is currently the Active Rock outlet WQLZ while 1410 AM is WIHM, part of the 18-station Covenant Network.
Apparently this decal was to be placed on the door of local store owners to encourage buying locally (back when "shop at home" meant down on Main Street, not via the internet.) A similar "shop door sticker" can be seen here.