What does it stand for

[Menamalak]

I came a cross a 1974 D quarter. There is an L letter under the mint mark. I was wondering if it means something or it is a minor error.

Thank you!

[Mohawk]

Hello and Welcome,

To answer your initial question it doesn't stand for anything.  That's because what you have there isn't an L, it's an example of some strange looking post minting damage.  From the pics, it looks like a gouge to me that just happened to take a form similar to the letter L. As such, it isn't an error or worth any premium over face value.

I hope this was of some help!

~Tom

[Menamalak]

Thank you Tom 

[Mohawk]

7 minutes ago, Menamalak said:

Thank you Tom 

No problem.  For what it's worth, it's one of the cooler looking gouges I've seen in 20 years of looking at coins

[Just Bob]

Welcome to the forum.   Keep looking.