||Scratched into reverse side
||Written on top red label
||Written on bottom red label
||5 02-10-86 39 10-15-71 4
||Etched on top edge of glass
||Etched on top edge of glass, also on both red labels
overall: 1/2 in x 5 3/8 in x 5 5/8 in
Object is a photo mask for a die of chips. It is enclosed in a plastic box. On both sides of the box are red paper labels with many initials for inspections carried out.