Numerals following a / ; / are series numbers, indicating either that there are multiple images of the same thing and/or that the three digit accession number has been rolled before.
X and E are additional numerals, standing for 10 and 11 in a duodecimal numbering system, also known as dozenal
Pip voids are positioned so an unfolded net of the Accessioning Die forms a sequential garden path.
J A M / A