The neck is straight - that is the frets are level when checked with a straightedge both up and down and diagonally. There doesn't seem to be wear on the frets.
The action is low.
Checking with the tuner, the 5th/4th fret is sharp by up to one red light on each string - that is it is in tune as itself but not on the fret used to tune the next string up.
Could it be the plastic strip in the bridge? After three decades it is rather grooved.
Am I just being too picky over this?
I can hear a beat between two strings which I would normally adjust out - but then the tuner tells me that one string is slightly flat or sharp when played open.
Just because I can hear or see a difference - does it matter?