The ‘p’ means pennies or pence. The value of these coins is 2 pence and 50 pence. £1 is the symbol for one pound. The £1 coin is worth 100 pennies or pence. It is easier to carry around one ...
Like all other dollar coins, they also say "In God We Trust" on the head of the coin and have an eagle and the words "E Pluribus Unum" and "United States of America, One Dollar" on the tail.