Thanks for the link Harold. Makes a lot of sense that it is convertible. We know what kind of multiple the '69 TA convertibles get compared to the coupes. Obviously, not as much of a multiple for the HOs, but likely a clear line between the converts and coupes.
1968 400 Coupe, verdoro green, black vinyl top, auto 1969 GTO Judge coupe, Carousel Red, manual 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver), Fire Red, white top, auto 1972 Buick GS Stage 1, Royal Blue, black vinyl top, auto