Astral plate +1 spectre with 3 blue and 3 white

Hello there,

i am wondering how this guys can have 3 blue and 3 white at the same place on all this armours : https://www.pathofexile.com/trade/search/Metamorph/kyro25Wh5


With the +1 spectre delv crafting is forbiden, same for split bestiary.
Then with Betrayal ? But the socket are in the same order ...

I need a tips !

+1 Spectre may be a Delve-only drop, similar to how Delve amulets can drop with +1 zombie. You cannot craft these mods with fossils. 3 white sockets are easily explained by 3* Vorici in Research.

Yes i just understand that Str armor have the white socket exactly at the same place !

Thanks