Hi Airbornebob, It's not a revenue but an unissued postage stamp from a failed monarchist uprising in the north of Portugal in 1919.
Thanks for the info...so unlisted by Scott I would presume...and with no real monetary value..?
I wouldn't expect this to be in Scott. It's one of a set of seven in the same design. I'm sure many collectors would be interested as not many seem to have survived but it's a pity there's no much damage.