And my Logitech #m570 is repaired once again. This time it was the button under the scroll wheel, which most of the time produced 2 clicks. The red/white thingy beside the black one is the original, defective. The mouse buttons were already replaced some time ago. Those infamous OMRON switches.
@hrodnand Here is a link to a datasheet PDF from the seller here in Germany, I think I bought from. https://cdn-reichelt.de/documents/datenblatt/C200/RND%20210-00188_ENG_TDS.pdf
The size of the switch is 6x6mm with a height of 5mm. Here is a screenshot with producer/part number/EAN code highlighted.
@chairraver Awesome, thanks a lot!
@chairraver Thanks, that might be bringing my old m570 back from the dead as well.
Would you mind sharing a link to the switch you bought?