Postcards sent to customers that inquired about sharpening their pinking shears. These cards are the only documention of the Model "D" pinking shears. It came out some time in the 1940s, and was discontinued before the 1950 catalog was printed. The first card shows the old style of the Model "A". I believe the new style came out before 1947. The first card also mentions an obsolete Model B. I don't know what it was. My guess is early 1930s before the Model C came out in circa 1933.