Just had that happen, some of the very little CRH this year and I open a roll and a big brit penny pops out.
Best one ever was still the 1913, 1917 and 1918 Indian rupee coins in the same 500$ bank bag of halves. Also had a few challenge coins and love tokens over the years.
That is the oldest coin I ever found in a box, though my find was (if I remember correctly) around 1918.