Delta Airlines Transportation Bottle Letterpress Printing Blocks

A new addition to my Jack Daniels collection. The bottle pictured is to show what the stamp looks like. It reads "DELTA TENNESSEE WHISKEY 90 PROOF". Being 90 proof if it was for Jack Daniels bottles it would have to be before 1987 because Jack Daniels was only 90 proof up to 1987. These would be the bottles you would get while on your flight.