Help Identify Mystery Revenue Stamp

I found this stamp and have not been able to find it anywhere.
There is a pen cancel so my assumption is that it is a revenue stamp.
'GADO' is Portuguese for 'COW'
Perhaps is is Brazilian?



Any help would be most appreciated

Netherlands
Unable to find any deeper knowledge, at this time.

Nice one Rod222.

GADO was a bus company operating in the northern provinces of Groningen and Drente: N.V. Groninger AutobusDienst Onderneming (Groningen Bus Service Company Ltd.). It was based in Hoogezand, a town in Groningen Province, and from 1958 in the provincial capital Groningen. The company, for a long time, was owned by the Dutch national railways (NS).

From what I can find, the stamp paid for press items transported by bus. "Pers" is the Dutch word for press. I think the addressee is Red - "Het Nieuwsblad." This was a newspaper. Red, most likely is either the editor (redacteur) or the editing office (redactie) of that newspaper.

Aha! Thanks NSK.
Googling, I had something like "Press Business Letter"
But I wasn't game enough to offer a "Guess"

Not seen this label in 20 years of collecting worldwide.

wow thanks NSK for all that information.
and also rod222 for the images
cheers

...and thanks to you rrogers,

It is always a delight to see a query married to a crisp, clear high resolution, deskewed image.
Take 10 points!