The parallel lines tell about the power of cool and calm forces, and they are tremendous. The lines are so straight, as just there is no any struggle to resist their power.
The length of the horizontal lines tells that we deal with some fundamental forces, slow and long lasting. Looks like the author is telling us about the ageing potential, isn't it?
But something is boiling and erupting from the overall calmness. We can say it is the beginning of some changes and the tension is still growing. Exactly, how wine developing over the time, that's it!
Eventually, all the figures are moving towards the top left corner of the canvas, trying to reach rarefaction, lightness and freedom. Escaping from the usual environment towards the new adventures. Beauty!
Shame, a bit after I understood that year 1971 was too late for Kandinsky as he left this world in December 1944, far before his painting was reprinted on the Moutons' label. And, occasionally, they were only two with Picasso (1973) memorised with Moutons labels after their deaths.
Why that his painting was chosen to illuminate the vintage? Is it really reflecting the style of the wine and the soul of Château Mouton?
The aquarelle painted in 1939 is now exhibited in the Georges Pompidou Centre in Paris. Going deeper into the problem turned out the fact that the painting didn't suite the picture, so it was turned to horizontal position, originally like here: