While checking my Baby Wildlife booklets, I noticed that the year "2011" appears twice on each stamp, I suspect the same are on coil stamps. The first "2011" is obvious and easy to find; the second is smaller and hidden.
I also noticed that each stamp has a black color portion which is cross-lined instead of being plain. I wonder if this could be a security measure?
I don't scan

. Therefore I let the hunting and scanning to anyone interested.
