GRUEN Precision rare black dial 510 James Bond style. So called Titan model in Precision version. Yellow gold coloured markers.
Working well with its 510 Gruen watch caliber elegant dress watch. 34 mm 10 K gold plated  case in good conditions. Black sunburst Dial, as shown in the photos.
10 k stunning Milanese elastic gold plated bracelet and new plexi. 
Item very collectable of my Gruen private collection