A collection of silver boomerang paper knives, Australian, including Hardy Brothers, comprising six pieces, the opal doublet one by Hardy Brothers and engraved 'Fourteenth Colombo plan Conference, Melbourne 1962', two with cast animals, a kangaroo and a kookaburra, one with an enamel coat of arms, one a flag, a straight knife with the coat of arms of Sydney together with a silver plated knife with a kookaburra.