If the second hand isn't fused to the 4th wheel arbor, it should put that kind of stress on the back of the jewel. If it is fused, and can't be coaxed off the arbor without stressing jewel, maybe you could put a drop of thin oil, penetrant, on the top of the second hand, where the arbor passes. Maybe that would loosen the bond to make removal easier. That said, again, under normal circumstances, it shouldn't be that hard to remove the second hand. Good luck.