What is this wooden part from?

[mecgp7]

I picked up a goody bag of n scale parts, etc. and there are several of these pieces of wood  The back side is like clapboards and the other is as you see it. The cuts do not go all the way through to the other side. My guess is the lines offer window and door placement should you cut all the way through. Any other thoughts?
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[wazzou]

I’d say that’s exactly what it is.  Maker unknown though.

[dnhouston]

That looks like a sheet from the Bar Mills "The 1-Kit".

[Wardie]

That looks like a sheet from the Bar Mills "The 1-Kit".

My thoughts bad well. Looks exactly like the Bar Mills 1-kit