Russian Offices in the Turkish Empire collection. Specialized collection mounted on exhibition pages, well over 1000 stamps covering mainly district overprint, full sheets with varieties, strength in overprint errors, highlights include Beirut 10pa on 2k inverted overprint (Sc#162a) in corner margin mint block, 5pa on 1k block of four used on picture-side of Navigation and Trade Co. postcard, Constantinople with unlisted mis-spellings 10pi on 1r mint with "Constanttnople", and "Constautinople" on right stamp of 35pi on 3.50r mint pair, Dardanelles 20pa on 4k inverted overprint sheet of twenty-five, margin block of nine of the same issue with overprint inverted on lower row of three and the other six with name omitted, Jaffa two types of 'J' inc. 20pa on 4k pair with both types, 20pa on 1k used on 1910 postcard to France, blocks and gutter pairs with overprint varieties in combination with normal of Dardanelles, Jerusalem, Mont Athos, Trebizonde, etc., in-depth collection with much unlisted material. Estimate  $10,000 - 15,000. $0