Production seems higher than you'd expect?.
These weren't popular here in snow country although I remember seeing a Buick SunCoupe once..
Did any other A-Body cars besides the Buick Skylark SunCoupes ever get these roofs?.
Below is the '72 Nova SkyRoof production by color...same 6822 total as noted above..
~ Pete
"...Skyroof Nova White top(RPO WV1)
1050 made
Skyroof Nova Black top(RPO WV2)
3075 made
Skyroof Nova Blue top (RPO WV4)
164 made
Skyroof Nova Pewter (RPO WV5)
202 made
Skyroof Nova Covert (RPO WV7)
1424 made
Skyroof Nova Tan (RPO WV9)
353 made
Skyroof Nova Green (RPO YH8)
554 made
Total Skyroof production
6822 made
These are for 1972 I don't know about other years.
Production started about March 1, 1972..."