Bird Feathers

These are vintage Monteith’s (or Monteiths) of Glasgow “Real Scottish Plume” feather jewelry — typically made with real game bird feathers (like pheasant or similar Scottish birds) arranged into bird-like designs for brooches, often sold as tourist/novelty souvenirs or traditional Scottish accessories. Your set (two earrings + larger brooch/pin) matches known examples from the mid-20th century or so.