calendar 1903 augustus Theodoor van Hoytema (illustrator) Tresling & Co.(publisher)
August 1906, Strobridge Lithographing Company, from the Strobridge Calendar Card Samples, 1899-1912.
Theodoor van Hoytema, calendar 1910 July
1986 Cloth Wall Calendar by TreasureFromMyTrunk on Etsy
Theodoor van Hoytema, calendar 1913 October
Learning Italian Language ~ I mesi dell'anno (The Months of the Year)