not so sure they have the correct origins. the prefab module is there. while the BH&G plans were available for purchase, this house is closer to the prefab layout, especially with the module.
there appears to have been some interior remodeling; tough to say what's original through these smallish photos. I wish it showed more exterior. Google and Bing don't reveal anything.
no evidence of other CM prefabs in the neighborhood.
I like how the landscape "hides" the house. that's my goal with mine