Condition Grade: Very Good. The antique paper calendar set displays minor corner creases, expected light edge-wear, and light age-toning along the margins consistent with original turn-of-the-century ephemera. Each individual card measures exactly 15 inches in height by 10 inches in width. The graphics feature beautiful lithographed art framed by the iconic "The Only Way" railroad slogan and active monthly calendar grids, alongside highly detailed reverse-side promotional text. This rare offering consists of a complete four-piece seasonal set without original mailing envelopes or corporate distribution portfolio covers. This incredibly scarce grouping presents a complete 1904 promotional campaign issued by the celebrated Chicago & Alton Railroad to capture early-20th-century travel market interest.