Would like to see if this is common or unusual so if any one has a pic like this post it. not sure why they added an A to it either?
I don't know of tons of examples, but here's what I've got in my files:
Very similar to yours (agrace is this one yours?):
Rescribed on the outside of mismatched stocks:
Other times you'll find other easter eggs inside like this star stamp, likely put there by the Chinese during refurb: