Howe - Orme guitar

I have a Howe - Orme guitar with a patent date on the end of the peghead  of 13 FEB 94.  My question is what kind of strings would it have been meant for at that time?  I seem to remember that steel string didn't come into common usage until the late 1890s.  Should I play it safe with "gut strings" or try extra light steel?

On a related topic, does anyone know the relative amount of tension produced by nylon (Aquila Nylgut), Silk and Steel, or Extra light steel strings?

Many thanks for the help, George