The gen 4130 movement is really one or maybe the best chrono movement in the world.
Gen one is really awesomeness, quality of parts/jewels/assembly and lubrifiant made it run like this
Like you could see signal is most a perfect straight line, quite no instability,
The rep SH 4130 is really a awesome clone, but a clone, parts are not the same quality, jewels not same too, without talking about the assembly quality of this movement, so even if you serviced it you couldn’t have the same kind of stability, just because parts used in are not same quality and precision than the gen one, and your movement should most of time run like this, and for this SH 4130 is very good result,
As you could noticed there’s a difference of stability between the gen one, and it’s the result in differences quality parts between gen one’s.
Most parts in movement have huge differences between gen, hard to notice just by looking at, but on timegrapher there’s no doubt.
I had build several Franken Daytona movement, means using gen parts, what I have learned is even if only keep the rep mainplate and fit all rest movement parts by gen, in the best situation you will have a timegrapher as good SH serviced, but most of time movement should not work good even badly, so not all movement parts are to be swapped by gen, just some of them, to have a more reliable movement than the stock one it was but you couldn’t most of time same results as per gen is.
Of course made a servicing is better just due bad quality oils and assembly, this movement will like this run perfectly and you could enjoy it for years,
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