Per the seller's description, the mov't serial number dates it to cca 1967, the case ref is visible 1600, BUT the caseback says I69 (1969) and 1601. http://www.ebay.com/itm/381605859678Purchases made through these links may earn this site a commission from the eBay Partner Network is this kosher in the rolex universe or is this a franken-rolex?