Model and units produced
-1006 26,979
-1026 3,135
-1046 151
-1066 5,067 1990-1992
-1076 13,805
-1086 1,660

1066,3rd most abundant OR 4th rarest.

Original box,cleaning kit,2 magazines drives the value up compared to a 10XX w 1 mag and nothing else.