@Phantom Gtowner, my mono copy is on the black label as well. I believe exactly what you said is the case, that they ran out of red labels because it sold so well and had to use black and blue labels as well.
There are also solid red labels and solid blue labels issued on this LP. Generally UA LP labels of this vintage in black were stereo and red ones were mono. However that theory is out the window on the black label scanned here because for sure it would state it's stereo. The blue labels might have been because the record sold so well that they ran out of red stock. Just a thought.
Add to what RC said, there's also the fact that this is a United Artists issue rather than a Capitol issue, thus puts it outside the "proper" Beatles US catalogue.
In the "Linked Releases", the Canadian label shown, is definitely NOT of 1964 vintage. It's clearly an early-1970s re-issue. A Canadian first-issue would have a label design similar to that shown above, as uploaded by nicoldo64.