1. Philatelic 57/4/1/20 Reference (shelfmark): Philatelic 57/4/1/20 Title: Siam (Thailand) Postage Stamp Issue: The '4 Atts' Surcharges Scope & Content: Examples of the '4 Atts' Surcharge on 24 Atts stamps issued between 1892-1893. Includes used and unused examples in singles, pairs, strips and blocks. Collection Area: Philatelic Collections Languages: English Date Range: 1892-1893 Extent: 1 Page; 13 Items