Chihuahua 20 Pesos Value?

IT sounds like you have P# S537. As to value it will depend on a few things. Price ranges from $4-$60

But let me ask a question.

Does the front of the note...does it say EL ESTADO DE CHIHUAHUA?

If yes then you have the note above.

There are 6 varities of this note.

1. Black Scalloped treasury seal on back (MI-CHI-64)
2. With date on back 27.3.1915-20.7.1915
3. Without seal on back
4. Black scalloped treasury seal on blank back (MI-CHI-65)
5. Black circular treasury seal on back
6. Inverted black scalloped treasury seal, date and block letters on back.

A picture of both sides of the note would be helpful

You do have a P # S537

In Unc condition the varities are from above with the following values (10th ed Specialized)

1. $10
2. $4
3. $20
4. $30
5. $12
6. $60


To me youy have either variety number 1 or 2.