black and white

[lovinwhiskey]

my bottle of black and whites is green, hip size, and has a metal sprung lid (unused) the seal over the top is in tact.
it looks very old, on the bottom i can just make out 'NB' looks like some numbers too by u can't decipher them.
'black and white' is bold leters on the front
on the back there is a label with the two dogs on the top... right at the bottom it says D20.

any thoughts welcome please, would have posted pixbut couldn't work out how

thanks
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[James T]

is it similar to this bottle from the 1930s