Magnet resistance?

Do any of the classic VC gold watches from the 50's - 70's have any resistance to magnets or should caution be used?

I recently had a WWII Longines pilot watch that needed attention after I accidently put it in my pocket along with a Blackberry case (for non BB users, the cases contain a small magnet that switch the phone off when inserted).

none of the VCs other than the current Overseas models have
12/19/2013 - 16:45
antimagnetic properties