Remaining wheel on plate ETA 8810

[Buf]

Hello

Thanks to the previous suggestion I got here, I was able to strip down the whole movement ETA 8810.

Now I have a doubt. 

There is a wheel that I don't know how to take out and I am wondering if it's supposed to remain there. 

Please check the pictures. 

As always many thanks in advance 

 

[HSL]

Ther setting wheel on that EB 8810 is fixed in place with a small pin and is very hard to remove, just leave it in place and lubricate it with a small oiler after cleaning.
They did stuff like this in the 60's just to simplify production and cut costs.