need help w/ dateing tequila bottle possibly from 1967

[Robv64]

My grandmother had some bottles in an old shed over the years, my cuzins knew she had bottles there and so one day my cuzins and i went into the shed and pulled out this tequila bottle along with a canadian club whiskey that was 40 years old.

this tequila blanco bottle has the name xalisco imprinted on the camp and on the lable thats barley there. on the back theres the bacardi bat symbol and the letters rdi.

on the top of the bottle there is a state tax stamp for liquor with a 6 digit number then a space then with 2 digits being 67 which i think the bottle was from 1967 can any one help me out with this ill post pics

btw the seal has never been broken
please if any one has any knowledge i would like to know and if its even drinkable

[*45*]

Rob, looks like you have a bottle that I would totally crack open and taste! Sorry no one got back to you sooner, but those pics are mighty small to get any real info from.