A brass-cased Duplex test gauge, signed Durrance, London, graduated 0-1000 (x2) with clamp in plush lined and fitted mahogany case -- 10¾in (27cm) wide

细节
A brass-cased Duplex test gauge, signed Durrance, London, graduated 0-1000 (x2) with clamp in plush lined and fitted mahogany case -- 10¾in (27cm) wide