Patek Philippe. An aluminium electronic marine chronometer with sweep centre seconds, in mahogany box

Patek Philippe. An aluminium electronic marine chronometer with sweep centre seconds, in mahogany box
Signed Patek Philippe, Genève, Naviquartz, ref. E 1200, No. 1'803'982, manufactured in 1981
Cal. 33 quartz movement, black dial, inner white Arabic hour indication, Arabic seconds indication to the outer raised chapter ring, sweep centre seconds, in black painted cast metal case with chromium plated bezel, hinged stand to the reverse, case, dial and movement signed
140 mm. wide & 200 mm. overall length