Timewalking Dungeon Boss Loot

I've seen from different info posts on wowhead and from Blizzard that Timewalking dungeons drop loot for your level/ilvl (and now more per dungeon).

What I don't know is does that mean the original raid boss loot drops are scaled up to our level now, or do you get current raid (Nathria) loot instead of the equivalent drops ?

I hope it's original loot scaled up, as that would be a lot of fun to go after a current version of older loot. I can't seem to find anywhere that specifies.

Thanks !