It says Royal Nally Ware. Not a brand I am familiar with, but I’d guess 30’s, 40’s?That's a beauty, what's the brand?
Edit; They were apparently quite big in Australia.
Powerhouse Collection - Collection of 'Nally Ware'
Collection of 'Nally Ware' household utensils, moulded phenol formaldehyde, made by Nally Ltd, Sydney, New South Wales, Australia, 1934
collection.powerhouse.com.au