Superb German 1924 Dated Shooting Prize Badge

This is a really well made badge and I am having to guess at its use, the obvious choice is a shooting prize award based on the cross rifles and central target. It is made in 3 sections from brass and enamel with a sandwich of green wool in the middle, on the bottom is written 'burger schutz 19. Verein.24 Materborn' a very rough translation gives me 'civil defence club' and Materborn being a place. For some reason the information on the reverse has been completely covered and spoiled, no idea why. It comes in very good condition and measures just under 1.75 inches in diameter.