ps if your tank IS blue , that is from a Norge?
No idea, it pre-dates my ownership but I certainly didn't see a 1200S blue option on the Guzzi paint code site, even for overseas markets.
After my minor success with the BSA tank last year, I am going to re-paint it the correct black but with a white detail to match the fairing / tail piece. I just don't want to have it off the road for 5 or so days to do the work at the moment!