Caution! Most of this stamps that are sold in the philatelic market are counterfeit/forgeries.
In authentic stamps the word ESTADO (vetical) is aligned with the word CORREOS (perfect angle aligned 90º):
Here are 2 counterfeit (top) and 1 authentic (below) to compare:
This is authentic. See the word ESTADO in relation to CORREOS :
This is a local issue and is know with the name of "Barquitos (Ship) Ban Right".
It exists with the localities of Guayana, Maturin and Mariño.