Since it's using silicon hairspring, i guess it will still be antimagnetic.
Transparent caseback, still got Anti-magnetic??? but I like the case back, not the front tough...10k a pop, so mine can sell higher liao 
The only parts that gets magnetized and affect timekeeping is the hairspring...
If the hairspring already made by silicon, which has no magnetic properties, I guess that effectively makes the watch antimagnetic...
My opinion lah...
Some ppl dun understand why the Rolex Milgauss is advertised as antimagnetic when in actual fact, all Rolex watches using the new Parachrom Bleu Hairspring is antimagnetic.