Photo of the V310 which I think looks similar and prices for the V410 on this page.
http://www.thevalvepage.com/tvmanu/murphy/murphy.htm
I only fixed a few of these sets, one thing to be aware of is the small decoupling capacitors in the IF strip, they fail like most capacitors of this period, they look like small resistors.
I am not sure if this is the same but some of these sets had no fine tuner control.