No US one cent coin struck in Philadelphia has ever had a "P" Mintmark so the coin is just a penny.
The British Half Penny was no longer issued after 1984.
It is worth face value.
1 cent
50 dollars
As of 2014 the estimated value of a 1988 P dime in the U.S. is 22 cents. The value of coins does fluctuate by demand and the market.
You'll get all of one cent for it.
about 3 to 6 cents depending on condition.
2002 mint sets in original package have a value of $15.00 to $20.00. The penny has never had a P mint mark.
If the surface has granularity to it or just looks strange is been treated with an acid and has no collector's value.
It's just a penny, letters or numbers added to any coin kills the collectible value of the coin.
P is for Philadelphia.
8.00 USD