Into the Deep Blue
For the Angola 1870-77 issue, forgeries are not uncommon. There are many kinds of forgeries, but the big two are Fournier and Spiro.
We have discussed the Fournier forgeries with the two preceding posts...
At least three of my Spiro forgeries are cancelled with this rather peculiar cancel. That might be a clue right there. ;-)
The thing that jumps out at me regarding this forgery is the fact that "Reis" starts out in the middle of the stamp, leaving the "5" with way more surrounding room than in the genuine. And the pearls on the right side of the crown going towards the orb seem small and misshapen.
Overall, though, the forgery is fairly nicely done.
Here, for comparison is a genuine 5r black. Let's look at specifics.....