Design pattern help ? Lapel pin ?

[Eastcoasthunter21]

Hello all hope your swinging your coils !
I've no idea what this is. Or was. But I feel I've seen the design somewhere
Any thoughts would be great thank you hh gl

 

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[austin]

Zipper end?

 

[DCMatt]

Half of a clip on earring? 1950's or 60's?

 

[Back-of-the-boat]

Picture frame turn button.