Pre-Owned TT3005M BR Class A3 4-6-2 60078 'Night Hawk' Steam LocomotivePre Owned Item, in excellent condition. Test Run. While the A1 was a fantastic locomotive that served its purpose as intended, it became clear reasonably quickly that some modifications could be made that would greatly improve its performance. These modifications however were too significant to avoid reclassifying the locomotives and as such the A1 Felstead 2743 was the first to be withdrawn from service only a handful of years after it was