Hi Seth,
I know there will be views to the contrary but especially in regards to discontinued models, a simple comparison of prices from trusted sellers or dealers online shall reveal that watches with original papers and boxes (based on my research on 1680, 1675, 1665 even 16710) will command a significantly higher premium. And that is not just a few hundreds but on instances 1-2 k upwards. The older the watch the higher the premium when comparing a watch with box and papers vs a watch with none or just a box. It has nothing to do with authentication imho nor with guarantee as -as many have pointed before - warranties have lapsed on these timepieces. It has to do with collect-ability and it seems the market has decided so. The more complete a watch the higher the premiums. That gap is exacerbated on older watches when making a comparison between incomplete vs complete sets. At least this has been my understanding in the market of second hand Rolex
