The ad was for a reissue of Rear Window.
Sorry for the low quality scan, but this is what the P.S. says, to the right:
If you wish to avoid a self-inflicted close shave I would suggest the following happier alternative, call your Paramount representative — Book REAR WINDOW and follow through with the excellent advertising and promotional campaign prepared under my personal supervision.
Great copy, but he desperately needed a good art director.