The 1903-1904 books have been seen with four format variations. Three of them (cloth) have different colored left sided cover vellum. The fourth has a suede cover. Each of the cloth covers have 16 possible flower illustrations for the right side of the cover. The beige cover vellum is more common than the blue or pink.
Below is a 6th cover for the database of the blue vellum format.
For more information on Series 143, click here