F90T17!!!!!

I promise you I'd get a picture! Here it is! I'm sorry it wasn't the best quality, but the new AC duct was blocking the fixture. This thing is about 62" by 18". The ballast, I'm assuming is GE, like the other one at my great-aunt's house. This one only has one lamp and starter installed, because he didn't need two 90w lamps over his desk. This is mounted roughly 5 feet off the ground. Can someone please date this? thinks.