8 Cents El Salvador 1937-1939

1787-1789 Establishment Anniversary of the Democracy in America. It's this wright? And there's (a picture), the Political Constitution of the USA.
In Reality in 1787 to 1789 Something happen with the French Revolution. And the Constitution of the USA was signed in 1787 and re-approved in 1788.
I love this Stamp any way because teach me a little of history.
What You think about this little confusion? Thank for your comments

1787 Convention
1788 Ratification
1789 Government begins operating
https://history.state.gov/milestone...ratification

Then Weakipedia is wrong, because they have THE RATIFICATION on June 21, 1788.

See my correction and addition in above post to explain the 1789 date.

Nice to know all those Details of history. Thank a lot for your help.