細節
A good [?]Czechoslovakian lacquered-brass mechanical equinoctial compass sundial in original case,
Jean Joutchera a Prague; 18th Century
the hinged hour-circle numbered IIII-XII-VIII and subdivided into half hours, two-thirds of the inner rim of the hour-circle is toothed for the index arm, the index arm with pointer at one end, small aperature (for string), a minute dial divided 0-60° (numbered every 5) and subdivided into minutes with a pointer and a hinged gnomon with three small and one large aperature, the base plate with glazed compass basin with four compass points initialled and a scale 30-0-30 and a blued-steel needle, with a cut-out section graduated for latitudes 40-60 and with a sliding prop for rod supporting hour-circle, and a plumb-bob support, supported on two screw and one bun foot, in original hexagonal leather-covered, chamois lined case
16.4cm (6½in.) wide