Deutsche Reichsbahn Railway Locomotive Eagle. Aluminum alloy eagle for “Deutsche Reichsbahn Adler” railways, with2/3 large mounting screws on the back, material designation “G.A1. Mg. - 81”, is the abbreviation for “aluminum, magnesium and silicon”, the element used to create compounds of the alloy from which the eagle is cast, On the reverse is marked with the manufacture “RZA BLN 1” which is the abbreviation for “Lokomotive Reichsbahn Zug Alder 1” and “BLN” is short for Berlin.