Part of a navigator's training was to practice bomb aiming. These bombs detonated a liquid causing a thin spiral of smoke to rise from the impact point. Thousands were dropped near Nhill.At the end of WWII thousands of the remains of these bombs were removed for recycling. Very few remain as an example of those used during training.This is a reasonable replica of an original smoke bomb used during practice on the bombimg range south of Nhill.No markingsbomb, bomb replica, practice bomb