1800 Early Dollar - grading code?

[Rruss6560]

I have a graded coin from NGC and want to understand the code above the grade.  "BB-193, B-13" What does this mean?

[World Colonial]

It is the die variety reference number.  One for Bolander I believe and the other for Bowers and his co-author.

[MarkFeld]

Welcome to the forum.  You’re asking about variety attributions. The “BB”  is for the Bowers-Borckardt number and the “B” is for the Bolender number.

[RWB]

Very nice coin, too!

[WoodenJefferson]

Let's see the reverse!

[Just Bob]

Nice first post! 

[DWLange]

Here are a couple of its siblings:

https://www.ngccoin.com/variety-plus/united-states/dollars/2708/818421/

[MAULEMALL]

8 hours ago, DWLange said:

Here are a couple of its siblings:

https://www.ngccoin.com/variety-plus/united-states/dollars/2708/818421/

So do you have a pic of his coin on file as well. 

AS an aside I snipped a couple pics off that page for a open page on my puter