Dimensions: 153 x 242 mm 2 Publisher: Koninklijke Nederlandsch-Indische Luchtvaart Maatschappij Date: November 1930 Description: Company envelope used for correspondence between the KNILM head office in Amsterdam (Nieuwe Spiegelstraat 5) and the office of the Bataafsche Petroleum Maatschappij in The Hague. Artwork by Blom.