Introduction to Rolex Valjoux 7750: an new Asian movement

rolex-daytona-mechanism-white-surface-38mm-watch-rd3877-37 rolex-daytona-mechanism-white-surface-38mm-watch-rd3877-37_1 rolex-daytona-mechanism-white-surface-38mm-watch-rd3877-37_2 rolex-daytona-mechanism-white-surface-38mm-watch-rd3877-37_3When I asked the owners, they were ok with getting rid of the running seconds gears, and then freeze the subdial since this’ll make the watch function a lot better and more reliably. Smart move. When people ask about the Rolex Daytona line, I always saw the identical thing – forget about the one with the running seconds hand at six, they’re always a problem. 11 gears in one movement is just too much of a strain.
All glory for this article goes to Ziggy, who took his time to bestow upon us his knowledge of the new at that time (circa 2012) Asian 7750, a copy of the Valjoux 7750. Yes, Valjoux, not ETA. As I said, this is a chronograph movement and is often times found in Breitling replicas and in the replica Rolex Daytona watches, among many others. The movement was meant to handle all that – think of a four cylinder engine being used in a big truck. Sure it’ll genuinely work but it’ll fail fast. That’s just based on I’ve seen in this trial.
Some are saying that recently there’s a new spirit infused into replica watches – a machine spirit known as the Asian 7750, with an ancestor in the ETA 6497-2 Chinese copy movement. I know I posted something related some while ago, genuinely long time ago, but I desire to go over this theme again. The Asian 7750 is not a B or B1, but is a whole new breed. Its finish, its fit, its reliability, everything about it will appeal to replica watch enthusiasts – particularly its 8 ticks/sec since it’s a 28,800BPH (BPH/VPH – beats/vibrations per hour) movement, as opposed to the previous, which were either 18,800BPH or 21,600BPH. For one thing, the finish is just incredible in comparison to the 7750B and the 7750B1. This one should probably be called a 7750A+ if you ask me.
Notice that this one comes from a Rolex Daytona replica that has the running seconds located at 6 o’clock. I know that we’ve covered this theme before, but you know how they say, repetition is the mother of learning. As I’ve stated before regarding the design of the Asian 7750 movement at the time the ETA-powered version was released, it seems like it’s just too tall of an order for the movement. Putting eleven gears thus you can operate all the sub-dials is bound to cause headaches and problems. Since I’ve seen many ETA-powered Daytonas in my shop and have not been capable to fix them (though I have been capable to at least freeze the sub-dials), I just can’t imagine how the layout can function better what with the fundamental problems between Asian-powered versus Swiss-powered movements. In some cases, it would be a fine concept to a step further and enlist the assistance of a trained professional in determining whether your watch is authentic or not. But my tinkering lead to some interesting discoveries.
Pictures and Details
Pretty nice-looking. This movement was genuinely brought in to me was just because it didn’t wind when it was in auto-mode. Let’s take a look at what the Asian 7750 is made of. Following are pictures and descriptions of what I found inside, which was totally dirt- and fragment-free! When I took off the case back, the rotor just fell out – it had broken off the bearing basically.
The replica watch was also left for servicing which is there is no doubt that a very fine concept – the owners knew what was wrong, could get it fixed, might as well take a look at the rest, and they knew it would be a long before they’d need anything else done to it, so. Pay particular attention to the detail on the dial and date wheels. Is there any unevenness? This is a tell-tale sign of an inferior replica IWC watch. When you know how troublesome an Asian 7750 movement can be it’s a fine concept to do some pre-emptive fixing.
Cannon Pinion Improvement
On this watch, the canon pinion isn’t lubricated, like all the other ones, but it had a lot of friction – as much as a Valjoux 7750. My first breakdowns of these models revealed some common problems always – no oil and lots of dirt, a bad cannon, and merely 12-hour wheels. This totally surprised me there is no doubt that. If you look at the clutch of the cannon pinion you’ll see that it’s superbly crimped and all-around better than any before it. Just a note – ETA/Valjoux cannon wheels can’t be exchanged for the Asian versions – if that were possible, I wouldn’t be in business.
Nothing was lubed up, and even worse the cannon wheel was way too loose – no friction, which means the hands start to run behind while the seconds are always accurate. After using the watch analyzer, I reworked the rate and the beat – the load changed both of them but it was not as bad as it was at first with the heightened friction. The problem seems to have been solved. The gears were reinstalled and the movement’s been working for two days.

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