What do MINT MARKS on coins mean? (What does NO mint mark mean?)

NO MINT MARK ! How To Know If It's Rare & Valuable

What is the Mint Mark on a Coin? Where is the Mint Mark?

NO MINT MARK COINS WORTH MONEY - COINS TO LOOK FOR IN POCKET CHANGE!!

US 1965 Quarter - No Mint Mark - No Silver - United States - Washington

Rare No Mint Mark Variety Coins Do You Have A Valuable No Mint Mark Error?

How Philadelphia Mint Hurt Coin Collecting With No Mint Mark Coins

The 1976 Penny without Mint Mark Coin Worth A Lot of Money! Coins Worth Money

The Most Valuable Coins in American History: Rare U.S. Pennies Worth Millions!

Are No Date Buffalo Nickels Valuable Or Mint Errors? What To Do With One?

No MINT MARK Coins? Complete No Mint Mark Guide CENTS to DOLLARS

1975 Lincoln Penny 'D' and No Mint Mark

NO S Dime Worth $525,000! 1975 S/S Dime $800! Proof Roosevelt Dimes

Which No Mint Mark Coins Are Valuable? How Do You Find Out?

1975 Dimes Without Mintmarks! You'll Want To See This One!

Value of 1967 US QUARTER (No Mint Mark)

What's your 1965 Quarter Worth?

US 1982 No Mint Mark One Cent Coins - United States Lincoln Penny Coins

1942 Wheat Penny Value: How Much is it Worth Today in 2024? OVER $20,000.00

1969 Penny Value Guides (Rare Errors, “D”, “S”, and No Mint Mark),OVER $750,000