I've been using a gecado model. 27 for quite a few years now for PC & plinking. Only lately has it come to my knowledge that the gun had belonged to my late great grandfather and obviously i came to the conclusion that it must be a shade older than i had originally thought. I am attaching photos and i was hoping if anyone could enlighten me as to how old the gun could be as well as what the gun would be worth. Thanks so much in advance.