ET Inverse printed circuit card
Xerox Data Systems, Inc. (XDS)
||Printed in white at extraction end of component side
||Assembly number printed in white at extraction end of component side
||Printed on the solder side at the extraction end
||Found printed in brass at extraction end of component side
||Stamped on solder side at extraction end.
||Stamped on component side between the two holes in the substrate
overall: 1/2 in x 4 1/4 in x 4 3/4 in
"ET INVERSE" is printed in white on the component side of this printed circuit card. There is a triangular inspection stamp on top of the printing.
SAP Collection, Computer History Museum