CASELLA & CO, CIRCA 1886
the lacquered brass instrument with four scales and verniers signed on the machine-tooled plane CASELLA & Co LONDON. S.W., ALTITUDE divided 0-80, the central rotating arc 0-80, the left-hand plane with sextant-like lattice 40-0-40, the bottom plane with similar lattice scale 5-90 marked HOUR CIRCLE, housed in mahogany case. [9½in. (24cm.) high in box]