Looks just like mine, which I believe to be original. I always figured there were enough of these around that faking wasn't worth it.

The stamped Mills ones HAVE been faked in HUGE quantities. Oddly, the fakes look better than the originals. If the legend is done in heavy well-struck letters, and fully contained on the rear lip, you may have a fake. But, if the legend is struck with rather thin letters, and they are running off the edge, you chances are good of it being OK.