細節
A well modelled engine-turned ivory hydrostatic float gauge,
the spherical bulb with detachable lower cistern, with detachable needle scale, contained in a shaped lignum vitae case -- 4½in. (11.4cm.) overall
See Illustration
the spherical bulb with detachable lower cistern, with detachable needle scale, contained in a shaped lignum vitae case -- 4½in. (11.4cm.) overall
See Illustration