The object has a dark green board with several integrated circuits on it. There are also other passive and active components. Toward the insertion end "Graphics Tablet interface" can be read.
Date
1979
Manufacturer
Apple Computer
Identifying Numbers
Other number
050
On white sticker on solder side
Other number
140
Printed in right corner of extraction end on the solder side of the board
Other number
670-0012
Printed in white at the insertion end of the component side of the board
Other number
670-9012
On white sticker on component side
Other number
820-0016-03
Etched in solder under the protective covering on the soder side