WS 25 Battery change on MechaQuartz IWC Caliber 631 R397 (SR726SW)
Note that this is the blunt blade. I really prefer not to use the sharp blade on the two bladed watchmaker's knife. But I have seen great artists with the sharp blade in watch shops. Sometimes the grooves or opening gaps on snap-on cases are tiny and you will have no other option then to use the sharp blade. Make sure you have disinfectants and band aids ready, I wish this was a joke, but unfortunately it is very easy to slip and cut youself. So again, first always try the blunt blade of the watch opener knife. I would also like to add that many watchmakers I have seen have their very own tools and methods and preferences. I am just telling you what I did and I never mean to lecture nor patronize you. You use whatever you feel best with.
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