It is Great Britain, Scott #420 if w/o the phosphor bars and #420p if it has these phosphor bars.
I believe that GB is the only country that issues stamps w/o it's name on it by just having a head of royalty on them. Australai would have to have the name of their country to identify them.
Just like to add that this 4d stamp was printed on two different machines...Rembrandt and Timson.
If your stamp has phosphor bands then it was printed by the Rembrandt machine. If a non-phosphor then either machine could have been used. Rembrandt printings have less detail on the face if you compare it to the Timson.
Disclaimer: While a tremendous amount of effort goes into ensuring the accuracy of the information contained in this site, Stamp Community assumes no liability for errors. Copyright 2005 - 2026 Stamp Community Family - All rights reserved worldwide. Use of any images or content on this website without prior written permission of Stamp Community or the original lender is strictly prohibited. Privacy Policy / Terms of UseAdvertise Here