Rare envelope, probably Boston Post or Boston Globe newspaper from WW1, unused. I do not know about issue history this envelope, how many?
For sure is original and from the period. Many years ago I bought that on garage sale in NY. Please see all pictures for a details. This item is in the category "Stamps\United States\Covers\Event Covers\Other US Event Stamp Covers". The seller is "flori-mont" and is located in this country: PL.This item can be shipped worldwide.