When the Elmore James/John Brim LP, "Whose Muddy Shoes", was released in 1969 by Chess Records, "Country Boogie" was on that album, listed under the alternate song title, "Tool Bag Boogie".
Checker Records was a subsidiary of Chess Records. This record did not get a lot of sales because they got a "cease and desist" order from the Bihari Brothers at Meteor/Flair/Modern Records, where James was still under contract with their labels. The Chess Brothers had to stop pressing and distribution of the record, so this single is a real rarity.