Hey folks This is a Chromachron made by Tian Harlan in the late 70s/early 80s. As you can see from the pics it has been worn, it's vintage and I am not the original owner. Comes watch only. See pics for condition. I will leave a link to a Hodinkee article where you can read up on this and learn more about why he made this like he did and what was produced, as it was produced in multiple forms. I have added a new black leather strap to it as the old one was too worn and dirty :) [https://www.hodinkee.com/articles/chromachron-a-radically-new-approach-to-time](https://www.hodinkee.com/articles/chromachron-a-radically-new-approach-to-time) $250 shipped conus PayPal F&F or Zelle. I have 59 positive transactions on watchexchange with good feedback so please read them. Also have an eBay store with hundreds of sales and hundreds of positive feedback so read them as well (offtherakcollectibles) Sale only, no trades. Ships from NYC so if you're in area can meet up locally. Please leave a comment here so I can view your transaction history and then message me if you're interested. Thank you!