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I'm servicing a little Mortima diver driven by a Cattin C66. Not a Patek, but a nice little beater with a "Kalashnikov" movement. Everything was going fine, it had been stripped, cleaned and ready to re-assemble. I'd just oiled the plate balance jewel and replaced the cap and went to pick up the shock spring. My brass tweezers were just a stretch too far to reach from where I was using my microscope, so like an idiot, I picked up the nearest set of tweezers (SS ones!). I looked down and picked up the tiny cap spring, and just as I was about to move it to the movement I felt that sensation we all dread. :startle: The "snick" feeling as the tweezer tips pinged the spring into the ether. I was like a rabbit in the headlights, not daring to move and straining my hearing for the sound of a landing (a futile effort with my "ex-military" hearing). I searched high and low from a frozen position, scanning the bench but nothing there. I gently started looking at my lap, shirt front, even got a mirror and checked my face/eyebrows/hair. Nothing. A magnet sweep of the whole area turned up two forgotten screws, but no spring. So, the point of this post. I need a new shock spring or a donor movement and I'm hoping somebody may have one in their parts box. This is the movement as shown on Roland Ranfft's encyclopedic site http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&166&2uswk&Cattin_C66 I've included a pic below of the balance jewel spring from the other side, shown next to a Seiko spring for size comparison. As you can see it's a tiny little bugger and not your usual item that could be replaced by a common BestFit spare. If anyone can help, please reply or PM me with price and availability. Cheers Jim