What do you mean?
The fiber glass seeing through stripe in the Imola tank only came on the 750 SS. The 750 SS is also refered to as a "Green Frame" due to the green frame and a green underside of the fairing. In 1975 the 900 SS came with the Imola tank but without this fuel stripe but there are also NCR tanks (origionals and replica's) with this stripe (I have a NCR replica with 2 fuelintakes and 1 fiber fuel stipe). Later type 900 SS came with steel tank. As far as I can recall the 900 SS came in silver gray with blue striping. Only 1978/79 the 900SS came in black with golden striping (this is a stunning bike).
You see identifying a vintage Ducati can be a real pain in the .....
Cheers, Ron