Possibly 'Rega' pump insect spray used for protection against insects, especially those that bite or carry disease. Used before the invention of aerosol spray.Old Australian copper and brass Rega insect sprayer used by residents in the Kiewa ValleyPossible copper container and pump - joined with brass fittings including nozzle. Plunger - red steel. Handle -woodinsect repellent, insect pump sprayer