The first publication was in Georgian in 1947 and the second in Russian in the journal Sovetskaya Arkheologia in 1972. I think the linguistic and political divides of the Cold War period were the reason why no one connected the Ureki brooch to the brooches we already knew about.
In the paper I argue that Roman emperors gave gold brooches and medallions to rulers beyond the frontier as diplomatic gifts. Finding them in graves in Slovakia, Romania, and now Georgia tells us something about how Rome managed relationships with rulers it couldn't formally control.
I'm very sorry for your loss
Ha, me too!
I tracked down the original publications. It was found in 1942 near the village of Ureki on the Black Sea coast of Georgia. Neither the dating nor the archaeological context are very secure, but it seems to fall into the late 3rd-early 4th c CE. This fits with the date ranges of the other brooches.
Even though their archaeological context is limited, these brooches tell an interesting story about Roman imperialism. But there's another layer: there is a second story about how archaeological interpretations are shaped by modern (geo)politics.