Autumn, in February?

For the purpose of illustrating this ebay auction, I have 'borrowed' the sellers photo of this wonderful Powell & Bishop jug, decorated with a design called "Autumn".  The seller is in the USA so I shan't be making a bid myself, but good luck to anyone who does.  It's a lovely jug, and I imagine it would perhaps have been part of a set, perhaps of 4 different seasons.