Broken Pusher 145.022 Speedmaster Case

I'm servicing the subject watch and someone before me replaced the pushers with aftermarket parts. They both needed replacement with the correct parts.The standard pusher key for the case would not fit either pusher.Well, the reset pusher broke off flush with the case when I went to remove it. I'm not surprised because it was nowhere near the correct part. Measuring the correct Omega pusher, it appears to be a 2.5mm x 0.25mm thread. I found a tap at Amazon, but thought I would post here to make sure my measurements are correct.

I also need any and all advice on removing the broken shell. I fear damaging the threads on the case and a good solution is welcome.

Thanks in advance.

I didn't see any signs of Loctite on the other one that came out ok, but who knows what the person did. I have used alum many times to dissolve broken screws in watch plates, but never on a stainless steel case. The tube is pretty soft and alum might work.

The bottom of the tube is smaller than the rest of it. Before going the alum route, I might try to cut a slot in it with a jewelers saw and try a screwdriver after application of heat.

Success!!

Al's easy-out suggestion was a good one. Unfortunately, the smallest easy-out I could find is still too big. There might be a smaller one somewhere, but a #1 was the smallest one I could get locally.

After much deliberation (one can always make things worse), I decided to remove the bezel and then use a jewelers saw to cut two slots 180 degrees apart along the pusher tube axis. I carefully cut them about half way through the tube thickness so a screwdriver would fit the slots, but not damage the threads. Then I applied some heat, but not enough to loosen the crown tube or discolor the case. With some effort, the tube finally came out. The case threads are not damaged and the new pusher fits fine!

So, if you shear off a pusher, this is one way to remove it. just be very careful not to damage the case threads. I'm sure there is more than one way to skin this cat, but this worked for me.

You never know what to expect when working on vintage watches. There is always a high probability that someone with limited skills, parts or tools has been there before you.

So, same protocol as when you have a broken screw or bolt head broken off; make a slot and unscrew it with a flat screwdriver!

Ingenious work! Well done 👍