Is this a 1979 $1 Susan B. S blob?

It is my understanding the S blob on a 1979 Susan B. dollar is only found on a proof coin. I have several of these coins where the S mint mark is clearly defined or filled in to some degree... Only this one coin has the edge around the mint mark which looks identical to the images I've noted to the proof coin.

The coin is the same thickness and approximate weight as my other coins. I know the blob coins aren't worth much but wanna know if they're out there without having been a proof coin first.



Only picture I have of this at the moment. I have to use my phone to take picture of microscope screen.

 

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Are you using Win 10?

 

I have win 10 on my computer... Microscope has own screen. Need micro chip to store pictures. I'm still sorting out things...

 

Can you bypass it's screen with a USB cable to your PC

 

Got it working... will add more pictures in a bit...

 

Its just a mint mark style varietyvista.com SBA mint mark styles

 

Here are a few more directly from the microscope.

 

Looks like it was damaged then worn.

 

Thanks Paddy... So a San Fran MMS-001

 

CN... yes, she has taken some hits. It is amazing what a microscope will bring out now that I have one.

 

The S mintmark punch used for the circulation strike dies was the same punch used for the Type 1 S proof dies.