On the basis that a picture is worth a lot of words, this is a page from the self adhesive Machins. The mounts are cut to size for each stamp as often the backing is of a variable size.
Early US issues did have the issue but the USPS changed the manufacturing process to prevent this. However, only time will tell on the long term effects.
Login to Like this post
"Stamp Collecting is a many splendored thing"
Please Note: Postings that were loaded from the old Discussion Board cannot be edited.