1991 4030 Movement Feedback/Verification

[coffeebikerunrepeat]

Hi all. I am currently in talks with a seller of a 1991 Zenith Daytona 16520 and I wanted to see if I could get some feedback from the community on some pictures of the movement (please see below). Unfortunately my watchmaker (Rolex Certified) said that only Rolex can work on the 4030 movements so he doesn't have access to parts/images/etc or else I would be asking him. I was able to find some 4030 movement photos online however there seem to be some differences and I was unsure if possibly there were some variations (and/or updates) as the years progressed. I am just trying to make sure that everything looks correct.

Thanks so much in advance, I really appreciate your time and expertise!

[Tools]

It's a slightly modified Zenith El Primero movement, any watchmaker can work on one.

Now, parts that Rolex used to modify it may be hard to get without a parts account if needed, but somebody who claims to be "Rolex Certified" (whatever that means) should know what they are looking at - they aren't rare.

Here's some info

https://millenarywatches.com/rolex-caliber-4030/

[geoach]

to my eye it looks like a cheap movement with mangled screw heads

[Thomas Mudge]

Run away from this deal.
This is NOT an original movement.

[worldofoyster]

looks rough