I have a collection of 23 of these 1 hwan notes that I
inherited and I'm trying to decipher if they're from the 11-a group or 11-b group, as there's quite a difference in their value.
I haven't been able to locate a watermark on the notes, and am not sure if I'm just being dense in not finding it.
Does anyone have any idea where the watermark on these notes is located, or how I'd determine if it is the thick/thin paper?
Thanks!!