The Daffodil Earring

[Spoilers for Hello! Sandybell Episode 46]
When Sandybell was a baby, she was a found in a shipwreck, and rescued by a man named Leslie Christie. Before he died, Leslie gave Sandybell an earring and said he found it with her at the scene of the crash.
Years later, Sandybell shows her daffodil earring to Linda Edwards. Linda suddenly remembers her past, and realizes that it was the same one she gave Sandybell as a baby.

Example of:
Orphan's Plot Trinket