Help identifying stones

[Lynchy]

Hi,

I was given the following stones, they used to belong to a barber.
I've been told that that larger one is a coticule, not sure about the two smaller ones.
Any help would be great.

Also how long does it normally take, after setting the bevel, to get a shave ready edge using a coticule.

Also do you use both sides or only the light coloured side.

Thanks in advance.

Lynchy