A die-cut Valentine, with heads that "pop-out." In pencil on the back, in a child's hand: "To Kendall Falke from Donald." Inside, a more mature hand wrote with a fountain pen: "Donald A., 1930"-- could that have been Kendall, in later years, going through her keepsake box and taking notes so as not to forget? Or Kendall's mother taking notes for her daughter? We can only guess.
No markings to indicate publisher; this might have been from a boxed set.