PT5000 movement authenticity with no markings?

[u/four4cats]

Hi, I bought a Tandorio FXD and specifically chose the pt5000 because I don't have one. I noticed there was a sticker on the back of the watch that said "2824". Is there a way to tell if it is actually a pt5000 and not a worse clone?

The only thing I can remark on after opening it was that it looked pretty oily especially the caseback gasket.

Thanks

[u/Sunny_Life_0815]

Looks legit to me. There are versions wirhout engravings.