Lorsa P75 stripped threads in main plate...what to do?

[LittleWatchShop]

I tore this down today to clean and noticed when I removed this cap jewel that there was an issue.  The screw did not want to work itself out on its own.  Once cleaned and upon reassembly, I confirmed this.

I fetched another screw from my collection, but that was no help.

What is the best approach here?

[nickelsilver]

Tap to the next size up and use the next size up screw. Sometimes a rap with a domed punch will close it enough that the original screw will grab, these only have to be snug not "tight".

[LittleWatchShop]

19 hours ago, nickelsilver said:

Tap to the next size up and use the next size up screw. Sometimes a rap with a domed punch will close it enough that the original screw will grab, these only have to be snug not "tight".

OK, I more or less did as instructed.  The tap that I had that was close to the right diameter was questionable, so I was afraid to use it.  Instead, I found a slightly bigger screw and self-tapped it in.  I was very careful...just turning a quarter turn then backing off...then a quarter turn plus a little...then back off.  I continued this until the screw was seated.

The screw was a little long, so before doing the above...I put it in a vice to work it down on a diamond sharpening plate.  Had some difficulty with the pin vise, so moved to just holding with tweezers.  The whole process including tapping probably took a half hour or more.