Artifact Details Title Optical glass mask Catalog Number 102731368 Type Physical object Description This square glass optical glass mask is divided into a 13 by 17 grid. There is a silver frame printed around the edges. A number of very small images can be seen in a few of the squares created by the grid lines. Manufacturer NBK Identifying Numbers Other number 4931 Scratched on the lower right corner of the glass Other number DEC 1611 9A F346 NBK Printed on the boittom edge of the glass Dimensions overall: 1/8 in x 4 in x 4 in Category Component/Semiconductor/other Related Records 102710967 Optical mask case
