I like them, although it would have been if you had them in a horizontal format so we could have studied them better. thanks.
Would u would u
like to buy some envolpose that haven't been open since 1916
They're upside down.
One of them was mailed in 1937, so not sure why you mention 1916.
If sealed, probably just due to moisture or humidity over the years.
If you are trying to sell them they belong in the BST forum.
A collector of Oklahoma postmarked covers may have some interest but few others would. The covers are very bland and have common stamps. Very little value is likely.
Very little value.