Spiralwinder casebacks on 1861 question

I'm aware that for installing the caseback on 1861s, the anti magnetic shield has to be removed. How much of a risk does this pose to the watch? Was curious to the experiences of people here!

Thanks!

https://www.spiralwinderwatchparts....exhibition-caseback-for-the-omega-speedmaster

Most watches don't have an anti-magnetic shield. I wouldn't worry about it. If you see your watch is running extremely fast it may be magnetized and you can take it to a watchmaker to be demagnetized. It literally takes less than a minute. You can also buy your own demagnetizer. Just make sure you know how to properly use it. See video below.

I have an Elma demagnetizer that's better than the blue demagnetizers. But it's way more expensive. With two clicks of a button I know my watch is properly demagnetized.

As dsio said, the bigger issue is the seal that you get. I would recommend getting the watch dry tested for water resistance. Any good watchmaker will have the tools to do it quickly and inexpensively.

I've never used an aftermarket caseback on an Omega so I cannot opine on the quality of the caseback you are considering. I actually prefer solid casebacks so I've never felt the desire to switch.

That gives me more confidence! Thanks