An amazing rare piece of tin-lithography advertising De Laval Cream Separators on a perpetual calendar. With the original metal easel and calendar inserts to track dates from 1810 to 1920. Early, early tin lithography advertising in outstanding condition and a quaint desk top size. The colors are bright with little signs of wear with only light scuffs on the outside edges. With complete calendar inserts. The only one we have ever seen. Condition: (8.5 - 8.8). Dimensions: 5 - 1/2" x 6 - 3/4".