Hello:
I am having trouble with these Sweden stamps. Putting the wavy line watermark aside, how do I best distinguish between the 1920-25 Perf 10 vertically no watermark and the 1920-26 (I believe it should say 26 not 25 again on this page.) which also is perf 10 vertically and no WM. So for example how do I tell the difference between a Scott 116 and a Scott 126?
Your guidance is appreciated as always.
