OK gents, Many thanks for your replies.
I'm not sure of the bobbin value as I've not had the time to trace the resistor, but will do so tomorrow.
I'll test the glass resistor again tomorrow but I definately had resistance readings this afternoon. I didn't know what readings to expect but tested to see if I got anything at all, due to the state of the resistor & the fact that I've never come across a glass resistor before. Both were in the Kilohms range so may be OK.
The K switch : It made no difference to the OHMs range, it just changed the voltage reading for my battery from 0.6v to 1.2v.
BLAST! You know I've got to take another look now.
Regards ..... Gary
Just checked the glass resistor ...... 180k + 60k so looks good.