...covering Australian comics
The K.G. Publishing Co. is a generic name used for this publisher where the specific printed name is not logged in the AusReprints database. The printed publisher name might be different.
56 Young Street, Sydney
This indicia publisher might be an error. "The K.G. Murray Publishing Co.", which was listed on other early comics, might have been intended.
Some publishers used diverse publisher names in their comics. These can reflect distinct operating divisions, but may just disguise operations in the face of bans or censorship. Ausreprints records minor variations as they can help dating for undated comics.