Glad you asked. I came here looking for information myself. I thought I saw something new just a while ago, mind you it was already dark. I saw an XN40 on the N79, Looking for the fleet number, above the drivers window, I thought the last two digits I had seen were "46" which would make it 1946. Again, it was dark so I may be mistaken, the 4 may have been a 1. Anyone else can confirm?