The "special rush reservice" text can be seen on loads of Columbia 45s that for some reason got re-promoted to radio stations, either with a different edit of a tune, as mono/stereo dj copies, because of a pressing/printing error, or flipping the b-side to a-side in case the intended b-side started to get radio plays. They were all, as far as I know, done at the time of the initial release of the tune in question.
Here's a whole bunch of them: