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I just finished repairing a Hamilton #940 21j open face 18size P/W. made in 1909 I have been working on it as I get the parts needed. I cleaned it , replaced the mainspring, balance staff, pallet jewels, top balance stone , and crystal . I had a bit of trouble with the timing , but finally got it to 20 seconds a day, which I can live with. While doing that I finished a painting for an up coming show called "Kathleen Louise Passing Bald Head " So I'm happy today

One other part I made on the "new" lathe is a proper strong and deep enough die to deal with tall crystals such as on the 1680 and VERY tall one of the 1655 (Sea-Dweller). Most foul on the crystal. My old solution was a 30mm 12-point socket. it works, but it does not press the retainer flat and square relative to the case top surface, so I have to go back and "peck" it down with another tool all around the crystal... Here it is: (The blue Tudor will be it's first victim)

I'm still there.

Excellent with both.

If you have the tools I suppose you could widen the jewel hole, turn a chaton for the jewel, and press fit the assembly. The measurements would have to be spot on though and I'm not certain you could press in a jewel that was originally designed to be rubbed in. Perhaps they have a different outside geometry than a typical friction fit stone. Another thing to consider is how much stress the oscillating weight would put on this fix. Perhaps that's why Rolex used a rubbed in jewel as opposed to a press fit?

Yes I made my own, I used 1/8 inch silver steel and a triangle file and filed the grooves at 90 degrees to each other. I then hardened the silver steel and tempered it to straw colour. I then fitted it into a brass handle made like a watchmakers screwdriver. If clocks interest you I recommend the book 'Tools for the Clockmaker & Repairer' by John Wilding which goes into details of making many tools including this one.

I find, if you learned to repair watches from books ( or find data), or "trial and error"; the internet is a bugger.