The above picture is supposedly another shot of the Nokia Lumia 1520v, the 1520 but in a pocketable size. Why call it the 1520? Possibly the same way Nokia went with the N97 mini? Or how Galaxy S3/4 now have ‘mini’ versions?
The alignment of the buttons is similar to smaller sized Lumias. Note however that they are slightly closer to the bottom, where as the 920/1020 are closer to the screen. Also the bottom edges appear to me more rounded like the 1520/925. The triple column is clearly seen here (though could be any screenshot).