1945 s Mercury Dime Mint Mark Question...

I have this MS-67 mercury dime in an old NGC holder that I was looking at selling then saw a sticker on the back that says Trumpet S. I'm not familiar with mintmark styles so I've attached a photo of the MM. Can anyone tell me if the sticker is accurate and if it means anything special?

 

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I looked it up, and I believe I found your answer.
http://www.varietyvista.com/06 Mercury Dime/San Francisco Mintmark Styles.htm

 

Looks like a Trumpet S. Now does that bring any extra money to it?

 

Good news- the NGC census says that yours is the only (and finest!) known in MS-67, with a total of 6 coins housed in NGC plastic. I think that means it's rare.
https://www.ngccoin.com/census/united-states/dimes/31/varieties/15060/?vc=820251

 

Thank you. I guess I will be keeping this one after all.

 

The mint style was only used years 41 ,42,43,and 45 on certain dies.
And yes it is a rare varity as to the mint make style used as in 1945 the style was changed to the ball serif and the micro s.