You wouldn't credit...

... the things I find on my desk.
I haven't the slightest idea how long it has lurked there, but it was accompanied by a 1906 1d;  a 1909 1d and an Eire 1d only 7 yrs younger than me.
I said, recently, I probably had enough books to carry me through February. If I turned to coins I might see out the year.
DON'T PANIC Mr. Mainwaring! © we're not all doomed. 

Oh, BTW Close scrutiny is contra-indicated, you'll see where I've been chasing shadows.

If you're way too young, e.g. younger than, say, 50; you may need to do a search for a 1d coin.
;¬)

For anybody interested:-