Sorry to drag this thread back up but does anyone know which 139 is on the stourbridge branch this week?
I was on it today and I think it was 139 001, so the one you're after! Half the time, i don't even look at the number of the train, but i can tell which one it is by the seating arrangement. Both have the same arrangement, but one is the other way round from the other.
001 has the folding seats by the platform-side door, where as 002 has them by the non-platform-side door, and I'm certain it was the one with the folding doors in front of the door when I got on earlier.
I wonder sometimes why people travel for miles around to look at them. The amount they bounce about at near 20mph on that twisty route, they make pacers seem tame! Maybe their nicknames should be "Nodding Donkeys 2.0"...
Anyway, I hope this is of help to you.