Glove box door without the lock which is correct for 1971-1972 Buick Skylark or GS. $10 plus shipping from California.
Yes, they are different visually. If you see the picture here, the label across the center which is specific to 71-72. The 70 glove box inside has cup holder indentations, which is the basic difference. 70-72 all is the same glove box cover and will fit and interchange. You only need to worry about this difference if you are doing a year correct restoration. Hope this helps. George N’s website (Buick Performance) has more info on the specifics.
You made me go look, so I thought I would link to it. http://www.buickperformanceclub.com/GloveBoxDoorDifferences.htm