How to identify the abbreviated values

Que significa:

Ms, 58,63,64,65

B.U.

AU 58, ETC…

THANKS

Welcome to Numista!

Here's a good place to start:

https://en.numista.com/forum/topic68487.html 

Standard list of abbreviations for use on Numista:

https://en.numista.com/catalogue/contributions/abbreviations.php

AU (About Uncirculated) is defined on the page.

BU (brilliant uncirculated) is on the list of abbreviations that shouldn't be used, but it is explained on that page.

MS ("mint state") isn't on that page so it shouldn't be used.

BU is used almost a thousand times in spite of being on the “do not use” list.

MS isn't used as often, and many cases are in personal names ("coin recorders Ms. Monica P. Galera and …").

(I don't see anything in the guidelines on the use of personal titles like Mr. or Ms. But they should probably be explained in the abbreviations list for non-English speakers.)

Welcome to Numista!

I see you are in the United States.

These are the commonly used grade levels for condition of coins used by United States collectors and the third party grading companies such as NGC and PCGS.

NGC Coin Grading Scale | About Coin Grades | NGC