Rolex

My brother owed me some money, and through a trade he traded me this 1966 Oyster Perpetual from 1966. This is 14k and stainless steel mid size watch, I'll open this up and check the movement when I receive my case opener. As far as I know, this is real. D...  

Just removed the band, looks like cheap imitation band. @12 between lugs registered design 6551, bottom between lugs 1581XXX serial number. The ref/serial # engraved not acid etched, but until I get my case opener / will take pictures if this is real. So ... 

Roman numeral II 67, Dr. Strong or anybody. Real, or fake? First picture is my Patek, this is real!!!...