This is a wristwatch that belonged to my grandmother. She used it for a long time, and I was told it was expensive when she bought it, but I don't know the exact price or brand name. There are markings on the back: k18 750 and the Japan Mint mark. See images 3 and 4. It doesn't work, so it's non-functional. I'm not familiar with watches, so I don't know which parts are gold. I'm selling it as junk, for parts or for someone who can repair it, with no returns, no refunds, and no exchanges (3N). Please refrain from bidding if you don't understand the meaning of "junk" or "3N," or if you are concerned about minor details, as it was expensive.