Is this a Canary Islands knife ?

[fernando]

Thank you Ian.
Before i have read your coments i have consulted a Spanish Forum. This example is considered ( quote ) more Canario than the Platans or the Coronas cigarillos.
... So says the Moderator of that Forum, who happens to be from Canary Islands, although he admited other members may be more qualified on this area.
For the finding of its maker and age, eventual file marks on the blade back would be a track. I am posting here and there this new picture, to dig into such possibility.
I am also e-mailing an expert i found on these knives, to see whether the blade notch ( muesca ) was reduced by its owner for practical reasons, as the blade back being so curved due to double edge sharpening, or both these characteristics be simple variations of these knives model.
Thank you again ands best regards.
fernando