Asian 7750 – OLD version Recommend with the understanding that it may need to be serviced sooner rather than later. Well this one has been hashed out here to death. Short version, it may run fine for you out of the box, but experience has shown that most are dirty, not oiled, or adjusted correctly. Parts are not easy to source, some OEM parts fit, some don't. Unless you have some spare movements sitting around, your out of luck for some pieces… Same cautions as the ETA model for time setting etc… The cannon pinion (clutch between movement and crown that allows you to set the time) is CRAP on these models. Everyone is loose, and not oiled. I tighten them all up on my jewel press as part of servicing, and also lubricate them. BUT you should only change the time if ABSOULETLY required, and then only as little as possible on these models…otherwise the cannon pin will fail, and no spares are available… A slipping cannon pinion is when the movement works fine, the seconds are running, but the watch “appears” to loose time, what is happening is that the movement is running, but the hands are not moving or slipping due to the cannon pinion slippage… 21,600 BPH Asian 7750 – NEW version Highly recommended. Only fault so far is that none of these are oiled as delivered, or oiled not well. The flaws on the old version have been corrected and the movement is very good. Some parts from ETA are compatible, some aren’t… Cannon pin on these is FAR Superior than the old model, better made, better quality, and tight…so no need to fix it. It’s not lubricated as delivered, so if your movement is NOT serviced, then adjusting the time is metal on metal wear and will fail eventually…do so as little as possible… Same cautions as the ETA model for time setting etc… 28,800 BPH
All I could find at short notice for you
Oh and this too
DO NOT set the date between 8 PM and 2 AM, or you will damage the movement. The dateset on the 7750 is not instant, it’s takes place between – you guessed it 8PM and 2 AM.