I have spent 30 minutes just making sure all dust and specs are off a dial and the inside of a crystal...maybe I'm not competent, or I'm just very picky...the time it takes is the time it takes, at least for me...
Looking at case ref. 1450006, the top and bottom pushers are different part numbers (which is unusual in my experience), so you assuming that has always been the case, you would need to compare the old pushers you have in the spare parts bag with the new ones in the new case, and identify which one in the parts bag is the top or the bottom pusher. I don't know what the differences are in these...
Your watchmaker would have to check to see if the pusher parts fit. You might have to remove the pusher tubes that are still in the case, and install the whole works that were removed from the other case. You could possibly even use the deals from the new pushers that were installed in your original case to seal the old pushers, provided they are not damaged or worn.
Let us know how it turns out.
Cheers, Al
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