It's a fairly standard Rapid Rectilinear lens it cost 80/- (shillings so £4) in 1898, should be a 12" f8 lens and would have been sold for a Whole plate camera. It was available with an Iris Diapragm as well in a choice of Brass or Aluminium barrel. It has plenty of coverage for a 7x5 camera. It could be a reasonable lens stopped sow, you need to make or buy some suitable water house stops.
While I've not used a Perken lens they were one of the leading London Manufacturers, Louis Gandolfi worked for them before setting up on his own.Perken Son and Rayment were dissolved in 1899 becoming Perken & Co so that gives you a cut off date.
They were typically used with a Thornton Pickard roller blind shutter either front mounted or between lens and lens board.
This is a 20" Rapid Rectilinear with a large front mounting TP shutter. The Between Lens type shutters have an interchangeable panel so can be used with different lenses.
Some TP shutters have Speed dials, the first does, this one doesn't. BTW that's a Wray 12" f8 RR. A TP shutter for the Perken lens is one of the smaller common ones. Speeds are 1/10 to 1/90 with T as well.
Forgot to add value, that's difficult under £100 ($123), I'd pay somewhere in the region of £30 - £50 depending on condition.
Ian