An International Delivery yesterday afternoon, turned out to be a Seiko 6309A diver from @UncleBuck. He offered it up for investigation as it seemed to be a non-goer. A good looking example of a bullet proof diver, what could be the problem? Time to pop the hood on this one and see the engine. At first glance, nothing wrong, a nice clean movement (compared to the last one). However, on closer inspection, the rotor was at a slight angle, not good. A slight touch to the rotor and no movement, doesn't look good so off with the rotor. Once the rotor was off the problem was obvious. One of the barrel/train bridge screws was protruding and also at a slight angle. Hmmmmmmm............maybe I could slip the rotor back on and have a "Seiko Bumper" Closer inspection under the microscope showed that the screw hadn't just eased out and got whacked by the rotor, it had obviously been cross threaded After letting down what power was left in the barrel, I removed all three screws and the bridge. I will need to fix that hole, ideally with a tap to clean the threads up, but that'll be a task for the next chapter. Until then, we'll just leave it in the case and start looking for watchmakers taps.