19104 and 19119-19127. The idea behind those (and they were all test buses) was that almost every garage that was scheduled to get cruisers would get two of the 2019 units with the X12 engine. Wayne, Ironbound, Howell, Meadowlands, and Newton Ave. I guess Washington Twp. was left out of that batch as they already had all the buses they needed. And Oradell wasn't even supposed to get new buses. That way, when the 20000's came out exclusively using the X12 engine (ISX engines were discontinued), the garages were ready to support them. (For the record, 17185 was the first bus built with the X12 for NJT, although the VIN says it has an ISX-12.)