1. Philatelic 72/222/1/15 Reference (shelfmark): Philatelic 72/222/1/15 Title: Siam (Thailand) Postage Stamp Issue: Denomination Overprints Scope & Content: Pre-existing postage stamps with new denominations overprinted by K. Oyama and Company, Bangkok using a lithography printing process. Collection Area: Philatelic Collections Languages: English Date Range: 3 Apr 1915 Extent: 3 Items