I'd like to get hold of a manual for my Webb mower?

I bought my Webb cylinder mower (used) about 20 years ago but I haven't used it for about 10 years (moved house - smaller garden). I'd like to get it going again but I need a manual to help with what does what and what goes where.
I don't know the proper name for the mower but it is a 24ins cut and I think it has a 5hp Briggs & Strattan engine. (The engine might be smaller but the details on it are illegible.