This magnificent and complete perpetual calendar likely hung in a Singer shop in Italy.  It is in great condition with the colors still bold and all the cards complete and in great condition.  This style of Singer calendar is also seen here in the US with metal construction, but these extra rare Italian ones are made of cardboard, and this one itself does have some wear to the top right corner.  A rare and unique find for sure making a wonderful addition to any collection, sewing room, or really anywhere in the house.