Black and White

[u8dust]

I have a bottle of Black and White choice old scotch whisky.
I believe that is from around 1949.
Does anyone know if the markings on the bottom of the bottle are indicators of the age and if so how to read them.
I am trying to figure out how old this bottle is.
Was purchased in Quebec many yrs ago and is in the quart size bottle that is no longer made.

[Jojo]

We can have it dated for you, but as always, we need photos! Also, let us know what "markings" are on the bottom of your Black & White.