The back plate and top with crystal are 5 grams and we did not want to take the watch apart as it does wind and does run but we figure the housing that holds the movement is at least another 5 grams and possibly more. Because it?s still working we are listing it. If it had been in any way broken, it would have been scrapped. Great project watch that is befitting of a new band and good clean. Very few of these out there so hard to get a comp. The band has been replaced with a flex band and note the face is a bit discolored. Very cool art deco watch by Illinois. See photos. Will ship USPS with tracking to winning buyer. Will require a Signed Delivery Receipt by buyer. Seller will pay for it and it?s designed to protect both buyer and seller in delivery process.