Spanish Conac from WWII Era?

Hi! I've been dying to find out about this bottle of Conac. My great uncle gave it to me before he died. He said he got it in France after WWII ended. He was going to give it to my father, but told me I was "better looking" so I could have it. The little I know about it is that it's Spanish and not French. It wasn't stored correctly so some has evaporated. I have no idea if this has ruined it's value- or even if there was/is any to begin with...

The label details are:
Fernando A. de Terry
CONAC
Destilado De Los Mejores Vinos De Jerez
Puerto Sta Maria
Terry

There's more information on the paper label around the neck. But there aren't any dates. If anyone knows anything about this bonitita conac, do tell!