I previously purchased a low priced watch winder from Overstock for my husband and returned it because it stopped working immediately.  That experience made me hesitant about the $40 Diplomat from Amazon.  But I was pleasantly surprised - we have had the unit for one week now and it works great - one hour winding and three hours at rest.  My husband has a larger faced Invicta watch but it fits perfectly in the case.  The watch is placed on a removable  watch holder.  Also, the unit makes no noise at all!  The cord is a decent length, and there is an option for clockwise or counter-clockwise rotation.  The Diplomat weights 14.10 ounces (400 grams).  The winder works perfectly for our automatic watch, and I recommend it.