I've been digging into these pieces lately but I'm just starting to learn about Colombia pieces... so basically testing my findings so far.
Let's start with Conf. Granadina pieces.
First picture. I feel confident about these pieces except the 5 cents in the bottom right. Is that a pre-philatelic Medellin Franca cencellation?:
Next in line... Again, most look good to me, except the top right and bottom right pieces.
Third picture. Are those good cancels? Again, that 1 Peso is suspicious to me... what do I know:
Ok... I'm lost on this one... I'm afraid they are all bad :( Please, tell me I'm wrong:
I'm pretty confident on this set. They all look good to my untrained eye. Is that red zero on the top right any special?
And finally this one for now. Again, mostly confident... except for the 1 PESO in the top left:
What do you folks say? Any special mark? Thanks in advance!