Help needed: can you identify this boat?

Please see attached an old picture on my grandfather first boat. This is the boat that led me to this marvellous boat addiction. We used to go fishing on it at the Atlantic coast of Andalucia in the late sixties to early seventies. I only keep very vague memories of it since I was then just a small boy. I would be very grateful if anyone could help me identifying the boat: manufacturer, model, etc. I reckon this is not an easy task given the very little info that I can provide, in fact nothing more than the picture and a gross reference to the late 60s to early 70s period