I doubt many people are into vintage watches except gen collectors or rep collectors. My guess would be they are probably real. Who knows, are interested or know how to get a Vintage Rolex reps unless they are on the fora?
A few years ago I could pick up a decent 5513 for 4.5k or less, so they were not expensive (emphasis on were not). Some could be passed down family heirlooms. Many gen owners send their watches to Rolex for servicing and Rolex will replace anything they see fit thus spoiling the originality of the watch. Also Gen owners update their watches with new bezels, hands, dials bracelets etc, all of which may not be period corect so who can tell if it is genstein, original (a little easier) or franken.
Conversely how would you know from a pic this is not a 1986 5513 with a 1964 7206 bracelet unless I told you both watch and bracelet were modded and both are frankens?