I have a set of case back openers for watches with grooved case backs, such as Rolex and Tudor. I bought this set a few years ago and have never used them. At the time, I planned to open a Rolex Explorer II that I had to see if the watch had the 3185 or 3186 caliber. Fortunately, I decided that that might not be a good idea. Anyway, I would like to give this set to an OF member who could actually use them. No charge...I'll even pay for shipping. Just a small way to pay back for all the assistance I've received as a member of this great community. Send me a PM if you're interested in this set. Best Regards, Mike