cz21 and lower shaft question with larger coil

[robinb]

I have just acquired a 2nd hand CZ21.

It has the larger 10" coil on it. (or is that 12")

Anyhow the lower shaft on one side where the bolt goes through has a larger O ring recess on than the other, the other side has some worn ridging to stop the coil moving.

The coil ears are different and not sure if that is due to wear on the shaft or not.
One ear is perfectly flat, the other side has a circular grove in it which might have been caused by wear from the lower shaft or not.

Can someone tell me what is normal or not ?

thanks

 

[robinb]

Here are the pictures of it.

 

[vlad]

if it is tight with the rubber washers though, no reason to replace it.
(The bigger loop is a 10.5"-the other being an 8"-I know of no case where a 5" has been offered, though one could be hard wired in.)

 

[robinb]

Thanks

In the end figured out the previous owner had let the damage build up by not putting a washer in place.
And then put a metal washer into the shaft end !

Repaired with jb weld epoxy and sourced some new washers.

Looks almost like new there now.

Just getting to understand detector.