Sterling Hidden order Watch Necklace Vintage

Product Name: Sterling Hidden order Watch Necklace Vintage
Unusual, vintage, silver, marcasite, and amethyst hidden watch necklace. This little beauty is marked “825” under the “door” of the silver pouch/watch container. The natural amethysts are in perfect condition and all of the marcasite stones are present. Very pretty scroll pattern on the front and back. The watch inside is held by a sterling silver chain and only has a diamond icon on the face. The hands do move, and I'm guessing it just needs a new battery, but not sure as I've never taken it to a jeweler. There is a slide that moves up and down the chain, and the chain measures approximately 32”. The clasp closes securely order. Please see all pics and let me know if you have any questions. Thank you.