Po dates: 1877-1918, in at the side and missing part of the back flap. No letter enclosed
Please see the other Allegheny County Covers from this collection for combined shipping. There is a separate categories in our store for this collection: 
Pennsylvania ~ Allegheny Co
Pennsylvania ~ Pittsburgh Only
** Click on the blue door next to the "me" and it will take you to our store where covers are broken down by category **