There's extra stuff in the box shown above.
Here it is at Akeda's Museum, D-51 Ranch Set (1976):
The cow rotates when a train passes (why? I don't know, I've seen a few cows in fields next to railways in my time, but I've never seen one do that!).
Akeda says that the cow crossing may also have been listed separately, but he's never seen one. No doubt Vio will add any further information that's available.