There's an Austrian Order of St. George on eMedals right now. I bet that this is the matching star! Check it out - https://www.emedals.com/auctions/austria-empire-a-knightly-order-of-st-george-commander-s-badge-c-1900
I believe that Godet marks like that are from c.1910. Not much help, but maybe points you in the right direction.
I've read that as well @Tom5, unfortunately hasn't helped quite yet! Thanks for the comment though.
There's an Austrian Order of St. George on eMedals right now. I bet that this is the matching star! Check it out - https://www.emedals.com/auctions/austria-empire-a-knightly-order-of-st-george-commander-s-badge-c-1900