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. The artwork is by Blom.