"Edge Detector" is printed in white along the extraction edge of this printed circuit card. There are two rivet holes at the extraction end. Between the rivet holes there are three stickers. One yellow, one blue, and one white sticker with "1691/" handwritten on it.
Manufacturer
Xerox Data Systems, Inc. (XDS)
Identifying Numbers
Model number
WT59
Printed in white at the extraction end of the component face
Other number
153124B
Printed in white in the extraction end corner on the component side
Other number
153125
Assembly number fount printed in white at the extraction end of the component face
Other number
223
Stamped on the solder side at the extraction end.
Other number
XDS-68
Copyright number printed in white toward the insertion end on the component side
