Here is a 1871 dated Portuguese red on light brown Fiscal / Revenue stamp with a face value of 60 Reis  
IMPOST DO SELLO  tax stamp  8th March 1871 

There is another stamp of the same date and year, I have compared them to see if the stamps have an over lap of a signature but there no cross over of signature.  

Issued in the reign of King Luiz I of Portugal

I do combine postage on multiple buys