It is solid material and it is near 14K gold and individual samples will vary. Us case makers widely acknowledged that their cases were typically 1/2 K under so A US case so marked could reasonably be expected to assay at 13.5K. Brooklyn Watch case, who made this one, once ran a ad stating their cases were the purest in the US because they were typically only 1/4 K under.
English cases are assayed from several samples and one sample was allowed to be 1/2 K under. I know of one English hallmarked case that its owner scrapped and the refiner came back for some of theor money becase it had less than 18K gold on final assay.
Long story short, It probbaly sold metal near 14K but almost certainly a bit under 14K. It is not certain but that is how "The smart money bets,". Nice buy.
Thanks for all the feedback! I purchased this watch, along with 2 others, for $68.50 USD. I take a chance on some pocket watches buying some, usually get 1 here and there that works good, then try to sell the others. Just as a way to try to pay for the watches that I do keep. So I sold the other 2 watches that came in this particular lot. So I'm actually not out any money for this pocket watch now.