Overall, great condition. 
 
I think the red bandana may be a post-WWI-era production. Everything else appears to be original. 
 
There is some minor staining present on the shirt, and the goggles have a crack in the middle. 
 
This was sold to me as a uniform that was issued and used by US forces in the 1916-1917 Mexican Border Campaign (often called the Panch Villa Expedition). 
 
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