Hi,
I have recently aquired some cut throat razors.

a set of two razors made by mappin and webb in a wooden box enlayed with green fabric with "nulle secondus" engraved on the blades. I think these might have Ivory handles ?

Another set of four in a wooden box also made by mappin and web with "the celebrated sheffield hollow ground special steel" etched/engraved on to the blades. These have black handles.

so a few questions ..

Are these good razors
Im sorry for asking but are they worth anything ?
is it worth keeping them and learning to use them ?

I will post some pics on the weekend if i get time and if it helps.

cheers