It is so hard to gauge condition on sites that use photos with white backgrounds and overexpose the images — I just avoid those types or listings.
Crown guards on 16710s are a bit round, you can best get a sense of the condition by looking at how sharp the the edge is, and you can see a bit of “ledge” on the top and bottom.
If you want to compare or study, I think Tropical Watch has some of the best photography (and are great to work with):
https://tropicalwatch.com/watches/search?q=16710+nos