Dan here, Are we looking at a 16880 transitional? Does show a lot of wear. Just my observations. I have a 16880 I purchased new in 1983, Box and papers, all contents and booklets. watch is perfect. Still can't believe I never let it go!
It would be beneficial if you could share any additional information that the seller has provided, but based on the (dark) pics it looks good. Case doesn't appear to be overly polished. I think the price is fair, too.