Looks like a later MkIV dial, but its worth getting the serial number because lots of earlier 666 had their dials replaced. If it's a matte dial watch, and you are lucky, you might get an original mettle dial for it.
Case back looks correct for a later watch.
My other comment is that it looks as if the lugs and strap have been "brushed" - not very well, but a service by Rolex would fix that.
Its all about the price.