|Note_en={{Dating|backref}} for an agreement with Australian governement of march 1951, and then references to last october so we assume at least a two year gap. Advertising for the [[Pen-Co 53]]. | |Note_en={{Dating|backref}} for an agreement with Australian governement of march 1951, and then references to last october so we assume at least a two year gap. Advertising for the [[Pen-Co 53]]. |