This is purported to be a photo of the backhead of the Bachmann model.

I can't speak to it's accuracy but the rectangular windows in the photo you posted look right.

Everybody knows about Ward and Walt, but they don't know about coconspirator Ollie Johnston:




Really fine modeler!


https://en.wikipedia.org/wiki/Ollie_Johnston
No Carolwood Pacific if not for Ollie and Ward!



Walt and Ollie:

That's not Lilly Belle!

Walt bought the "King George the V" from the Bassett-Lowke showroom in London. Strangely enough, another future Disney legend, Harper Goff, had tried to buy the loco the same day! Goff later joined Disney and was one of the geniuses behind Disneyland. He's also responsible for the look of the Nautilus and later he designed the sets for Willy Wonka. Oh, and he was also the banjo player for the Firehouse Five + Two:

Ward takes Salvadore Dali for a ride:

Walt takes Ward for a ride on Dick Jackson's home railroad:

Ollie Johnston's depot bears a definite resemblance to the G.F. station:

Well, the Bachman model has a different back head than the picture of Walt and Ward. Not sure which engine this is. Would that be a Great Western "King" class Walt is purchasing? I love those Great Western engines! Love the "Castle" class.
One thing many Yanks don't realize, or have trouble wrapping their heads around:
Many of those British engines had 3 or 4 cylinders! 2 on the outside, and 2 between the frames ! Toss that one around in your mind for a few minutes! Different engineering, different mindset.
I was aware of Ollie Jonson from the Special Features of some of these classic animated movies. They speak of the "9 old men" at Disney.