Angus Young's stage worn school boy cap, light blue twill cap applied to the front with white felt letter 'A', maker's label inside 'Gay Star Styled by Philip Joseph of South Yarra'; and a letter concerning the provenance from former AC/DC bass player Mark Evans confirming that the promotional cap was acquired for the vendor by him and that it was worn on stage by Angus Young in 'the latter half of 1975'; and reproductions of two promotional photographs showing Angus Young wearing an identical cap (4)