Williams 40201 Scale 4-6-4 Hudson NYC #5207, Bell, Whistle, Smoke, Runs Well
It ran well in F-N-R. Headlight works, bell and whistle (2 tones) sounded on cue. I did not test the smoke unit. It holds the rear wheel set on the tender (another PIC close-up). To replace it requires removing the rear coupler retaining clip.