Vintage metal hook fastening. Two part construction - flat shiny metal base with scalloped rim, which has two sewing holes for attaching to fabric, and a hook on one side. Over this is a decorative, pierced grey metal piece, rivetted together in the centre. The base piece reflects light through the duller top layer, depending on how the light catches it. Several examples are shown in the last photo so you can see how the light varies. Price is per hook

Size 1.5” (3.7 cm) diameter