Tufa?

NAY, Twofer; twofer the price of one.
At the top - The annual - "Rub it in why don't you?" 
Like I'm likely to forget? Ancient - I may well be, senile I ain't - YET.
At bottom - Charlie lll, first sighting.  Expect a macro in the near future, I've since noticed all manner of tiny "marks" all over the stamp surface.