W800H, cool project, works great (it was my gym watch). Has the tiniest little bubble just to remind you that this is oil filled. I also modified it to have the countdown timer function, and removed the beep functionality completely - to be clear, it cannot make any sounds (I prefer it this way because otherwise it will beep every time you press a button, other than the light button). 10 year battery has 9.25 years left on it. You can buy this brand new for the same price, but oil-filling is a pain in the ass, trust me. Why not take a flyer on this fun cheapo! If you buy one of my other watches I recently posted, I'll add this on for $7. $25 shipped USA paypal F and F or zelle (I prefer zell) Timestamp - [https://imgur.com/a/DyopP7x](https://imgur.com/a/DyopP7x)