2nd printings of spell tomes?

[Vlarg]

2nd printings of the core set have 10 changed cards  from 1st printing (2 additional cards have errata but were not updated, Helm of Fear and Chain Lighting).

Are all core spell tomes 1st printing or are there 2nd printing with these 10 cards updated as well?

If there are 2nd printing core spell tomes, how does one tell the difference?

[Boocheck]

Well, i guest that you would be able to distinguish them by different code or year which is stated in a lower part of cards

[Moonglow]

How can we tell that when we're purchasing?

Well, i guest that you would be able to distinguish them by different code or year which is stated in a lower part of cards