If you are asking why it does not have a mint mark, that is simply because it was struck at the mint in Philadelphia, which for most of its history and for most of its production, didn't put a mint mark on any coin. That has changed in more recent decades.
I will suggest that you get a copy of A Guide Book of United States coins from Whitman. It is also known commonly as the "Red Book." For $10-15, it will provide a lot of reliable, basic information about your US coins. It is a nice reference, and while there are more detailed references for grading and pricing, understanding the information in that book will reduce your odds of getting burned if you go to buy or sell some coins. And if you need help from folks here in figuring something out, that info will help you formulate a specific question so that everyone understands what you want to know.
I will suggest that you get a copy of A Guide Book of United States coins from Whitman. It is also known commonly as the "Red Book." For $10-15, it will provide a lot of reliable, basic information about your US coins. It is a nice reference, and while there are more detailed references for grading and pricing, understanding the information in that book will reduce your odds of getting burned if you go to buy or sell some coins. And if you need help from folks here in figuring something out, that info will help you formulate a specific question so that everyone understands what you want to know.





















