1960s Marcho Butterfly Wing sweater clips

Darling pair Marcho butterfly wings used to create a mid century tropical scene, covered in glass and set in a chrome frame. This clips that attached to the sweater are in good working order and are made of a chrome like material as well. There are no makers markings that I can find. They are in good condition. Please refer to the photos as they are a true representation.
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Dimensions:

Each square clip is approx. .75" squared.
Length of clips stretched is approx. 6.25"
Circa: 1950s or 60s
Condition: Excellent condition, some minor discolouration on the back metal of the clip part on one of the clips, very minor please refer to the phots.
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