MG warmtone FB or RC???

[Pherdinand]

i have encountered a surprising box of multigrade warmtone paper from Ilford, on sale on the bay.
Is this now fiberbased or is it resin coated??
As the golden large letters say MGRC but the white text says multigrade FB
😱
have you seen anything like this?
is it a mistake in printing? or is it fake? or is it some special stuff i never heard about?

 

[miha]

Looks like mistake in prinitng to me.