A black enamelled brass air flow meter No.15816, in fitted leather case; and an oxidised brass clinometer by Hugh Rees Ltd 119 Pall Mall S.W. in leather case (2)

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A black enamelled brass air flow meter No.15816, in fitted leather case; and an oxidised brass clinometer by Hugh Rees Ltd 119 Pall Mall S.W. in leather case (2)

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