From Stamps of the World
To see only pages that require images (have placeholders with no image) visit : Mexico Image Requirements
See https://commons.wikimedia.org/w/index.php?title=Stamps_of_Mexico,_1856-1900 for a gallery of issues up to 1900.
This category has the following 2 subcategories, out of 2 total.
Pages in category "Mexico"
The following 39 pages are in this category, out of 39 total.