It's probably an UltraSharp 1707 or 1708.
Really, any UltraSharp 170xFP or 150xFP would be worth investigating and buying. For those who want to purchase new, the Dell P170 and P190 are more or less the same display, but at 17 and 19-inch sizes, instead of 15 and 17-inch sizes.
I have a 1505FP that I eventually intend to hook up to my 840av or Q610, using that should be nearly identical to using the original 15-inch LCD Apple Studio Display.
Really, any UltraSharp 170xFP or 150xFP would be worth investigating and buying. For those who want to purchase new, the Dell P170 and P190 are more or less the same display, but at 17 and 19-inch sizes, instead of 15 and 17-inch sizes.
I have a 1505FP that I eventually intend to hook up to my 840av or Q610, using that should be nearly identical to using the original 15-inch LCD Apple Studio Display.