The difference between the 1996 and 2000 WiF Classic countersheet 24 is that some US Entry Chits are changed :
1939
0 --> 1
3 --> 2
5 --> 4
1940
0 --> 1
0 --> 1
The difference between the 2000 and 2007 WiF Classic countersheet 24 is that some US Entry Chits are changed :
1939
0 --> 1
0 --> 1
1940
0 --> 1
0 --> 1
3 --> 2
4 --> 3
1941
3 --> 4