Opinion : value of box & papers

It's also going to depend a lot on the condition of the watch itself. The only people who are willing to pay a lot for accessories are serious collectors, and most serious collectors will only be interested if the condition of the watch is really strong. So a mediocre watch with box and papers still won't bring a lot IMO.

A wise friend advised me, "condition over paper." I was trying to decide between a vintage watch with full papers including sales receipt vs a watch in nicer condition. Always choose the nicer condition, which is what I did.

As Dan S said above, a great condition watch that you would buy based on its condition alone is enhanced by paperwork. But it's often at considerable cost. The paperwork will just be tucked away and you will need to inform your family that in the event of your death, this watch is worth more with the paper and box. ( they won't remember or care.)

I am anal enough to like papers and originality but only if it isn't a lot extra.

So, to try to answer your question, additional papers often add an excessive amount to a watch. If the condition is excellent and it is hard to find, you might find a willing buyer. Otherwise, you will have to sell it for close to the price without papers if you want to actually find someone willing to buy it.

Other big collectors look for original owners above all. Papers are a bonus but not as much as provenance (of course, which is often proved by paperwork. ) but if you are getting for yourself then it's enough to know the story without needing to prove it.

You have a great watch. Based on the one picture, the speckling on the dial is not something that appeals to me so the additional papers wouldn't matter.

GLWTS

Cheers.