Wray 2" f1.0 copying lens...

Just bought one of these ULTRA fast lenses on ebay for next to nothing but I

know next to nothing about it.

I dont know what aperture it stops down to, whether it contains a copal shutter

or not or whether it can be adapted to fit a DSLR or not?

Basically, I would just like to know as much about it as possible and I am

hoping someone here may be able to help as I cannot find anything about it on

Google or Yahoo.

Thanks.

Alf.