This is a copy of the Tilley EX100 made from 1946 onwards when Australia was operating an import ban as a result of WW2. According to the decal underneath, this one was made by W. Kopsen & Co. Pty. Ltd, 376-382 Kent Street, Sydney. Phone MA6336, although it's difficult to read after a previous owner stuck parcel tape on it... It's missing it's reflector, obviously. I think this is a brass fount (as opposed to copper) although the amount of verdegris on the tank might possibly indicate otherwise...