ST19 this is the simplified name of the movts family., seagull st19XX (in different modifications), which is needed to simulate the OP.XXV based on minerva used in the pam518, pam519, pam520 chronoaf line.
This is not the same, but the most similar, and also a chronograph with 2 sub-dials and a manual wind.
In the standard version, it looks like this:
This is important, because the model you are looking for has a transparent caseback and you can see the movt.
In watches, it will look like this:
The option you are discussing with a quartz movt., As the respected ALE pointed out above, is just a fantasy, and in addition to the non-existent design with black PVD, and not matching all the details, also has a quartz movt., which is probably not bad, but:
- Panerai has never made a quartz watch.
- It is not suitable for rep mechanical watches, because the rhythm of the second hand will be different.
- Quartz radiomirs of this kind, made "based on" the design 518/519/520 parnis sells <100 $.
Finally, find the v6f version, some referred to it as XF, with movt., St19, and be sure Q series.
And have the correct case and crystal profile:
This factory made the whole pam518, pam519 and pam520 series at its best. You must remember that in any case there are drawbacks that I will not mention here, I will just leave a link to the main reference material in this case:
https://forum.replica-watch.info/fo...ca-search-identification-evaluation-selection
In the white case, you understand that when choosing any of these 3 models, there will be a difference in weight relative to gen, because you will not get platinum, white or rose gold.
And finally, so that the search for rep doesn't get out of touch with reality, here is a photo of all 3 models of this gen line. Enjoy, and tag how they should look when rated for rep quality:
PAM518
PAM519
PAM520
I think now all this has become a little clearer for you, and you will be able to understand everything, evaluate, make the right choice, and find one (probably only m2m), and be satisfied with your high-class rep (compared to the link that you gave).