A COURSE AND BEARING INDICATOR AND CALCULATOR INSCRIBED ON THE OUTER RING 'WITH THE COMPLIMENTS OF THE MARCONI INTERNATIONAL MARINE COMMUNICATION CO. WITH VOLVELLES AND POINTER, THE CENTRE TIGHTENING KNOB INSCRIBED 'LIEUT D.M. ANDREW ROYAL NAVY' -- 5 3/8IN (13.7 CM) DIA

細節
A COURSE AND BEARING INDICATOR AND CALCULATOR INSCRIBED ON THE OUTER RING 'WITH THE COMPLIMENTS OF THE MARCONI INTERNATIONAL MARINE COMMUNICATION CO. WITH VOLVELLES AND POINTER, THE CENTRE TIGHTENING KNOB INSCRIBED 'LIEUT D.M. ANDREW ROYAL NAVY' -- 5 3/8IN (13.7 CM) DIA