[MikeCross]

All four Thermistors are OK both physically and electrically.
I used my scope for many years and it has not been touched during my ownership. It gave good service and was light to carry.
The components look good but there is a lot of evidence that work had been done to it in its earlier years. In a couple of places diodes have been soldered across original diodes.

Testing at the moment has stopped as the scope I was using has been returned and I am awaiting another loan scope to arrive.