It appears it did not sell well initially and in 1928 was renamed Parwill and about 1934 it reverted back to Vegemite.
The slogan "Marmite, but Parwill" was used, refering to the similar British product that had been sold in Australia since 1910.
Thank goodness it is available in the supermarkets in England, don't know what breakfast would be like without a smear of Vege' on the toast !
History lesson over
Richard