Italian clothing

A German fashion retailer and an Italian clothing manufacturer concluded a contract for the sale of fashion goods, with the specification "autumn goods,
to be delivered July, August, September +-". When a first delivery was attempted on 26 September, the buyer refused to accept the goods and returned the
invoice on 2 October claiming expiry of the delivery period. The parties argued about the meaning of the above specification, relying on different additional
factors allegedly known to both parties.

Sample Solution