Got a link for that one? I can't find it.
The sticker says I bought it in 2017 so exact models have changed since then.
Today's equivalent is probably this: https://www.aliexpress.com/item/32658819804.html
The ad says "10. Each board at the factory to be detected with Aglient 6 digit multimeter, and marked with the output voltage, user-friendly."
(nb. Random seller...I have no idea if they're good but they've sold 65 and got good reviews)
This is just a description, and the photos in the comments clearly show that there is no voltage measurement sheet attached. When I was buying mine, I had to do some research at auctions to find one with a handwritten card, because there were also printed cards where all the copies sold had the same voltage values (cheating).
Currently, in the same way, you have to look in the photos attached in the comments if there is a sheet with voltage measurements.
Here, for example, there is a comment that the PCB is described, but there is no message with what accuracy. On the other hand, in other auctions I have seen descriptions only up to the third decimal place.
https://www.aliexpress.com/item/1005004617368378.htmlhttps://www.aliexpress.com/item/1005004186281432.htmlHere again you can see on the printed sheet - but it's hard to tell if these are real voltage measurements (too small photo in the comment).
https://www.aliexpress.com/item/1005005609015568.htmlHere again the version I have in the acrylic housing, in one comment there is information about the attached voltage measurements.
https://www.aliexpress.com/item/32813473384.htmlHere again versions with LM399:
https://www.aliexpress.com/item/1005002791469664.htmlBut these are just examples of found auctions and I am not sure about the quality of the offered goods.
AD584LH on the linked one is likely fake on these as they haven't been made in quite a while - 10 years or more. The picture does show a 1223 date code, but well... you know...
I think they're likely to be second hand chips pulled out of old devices.
(i.e. well burned-in )
Yes, in mine there is a 100% old chip desoldered from some device, you can see it by the condition of the metal housing.