1819/8? Capped Bust Half Eval. And Grade Request

Hi,

Please describe this fifty cents piece insofar as:

1) the O (Overton) number and

2) the R level number and

3) the type or description (ie overdate or large # ? etc.) of this Capped Bust half and

4) the grade and

5) the Breen #

Thanks,
mdpmedia

PS: Please explain the significance of a Breen # (ie 4629... ?) for this particular coin and how it would compare to an Overton #).

Do Breen #s usually provide the same type of info. as Overton #s do?