Black & White Whisky Age + value?

Dear all,

at the weekend I have found some alcohol bottles at my grandfather's and am wondering how old these might be and what their value is.
Could anyone of you help me?
Find below pictures of one of the bottles:

[Jojo]

Thanks for the photos - we'll see if we can date your bottle of Black & White.

[Jojo]

This bottle of Black & White has been produced with a gift carton featuring the strap line ‘The Secret is in the Blending.’ This was quite a large advertising campaign for Black & white which ran from 1950 – 1963, and the bottle has the Royal Warrant statement from the current Queen, which was granted in 1955, so the date range for the bottle will be 1955-1963.