If you do a 'Search' on here quite a bit has been written about the 335.
Very accurate rifle if slightly underpowered with the standard piston head. A PTFE replacement is said to give better m.e. but I personally dont have any personal experience of this.
Its one weak point is the stock to action fixing points which have been known to break. With the barrel catch sliding forward its the earlier version. The target or 'S' version came without a back sight facility (on the barrel) and a weaker main spring. The club has one of these rifles for 10 metre shooting and we got it off B.A.R. at a special discount price of £120. It is in excellent original condition and includes the Williams peep sight. I also have a couple in my collection.
HTH
Ian