Collectible coins, such as those minted in the United States, can range from historical pieces to modern commemorative issues. A "1 Roll" typically refers to a roll containing 50 coins, often in a sealed packaging for preservation. The 2019 dollars from the Philadelphia mint may include various designs, such as presidential coins or state quarters, appealing to collectors due to their unique attributes and limited production. The Philadelphia mint is known for producing quality coins, which can enhance their value in the collectible market.