goldtone TRIFARI clip earring backs

Not really earrings or at least I *hope* not as they'd certainly be amongst the most dull and boring style ever made -- rather I'd suppose they used to be glued to a pair of 'something else-es' to be hidden behind while clipped to somebody's ear lobes.

ANYBODY GOT A CLUE what forzactly that 'something else' would have been -- or would these in fact be 'generic' backs used on all sorts of TRIFARI designs? I'd guess the latter but certainly don't *know* that...???

These were the only marked, and only pair, of a small handful of assorted earring backs and parts found orphaned in the estate box. TRIFARI must have used some bad glue that day at the factory...??