An eighteen carat gold gentleman's mechanical 'Tank' style mechanical dress watch.  This is a rare example of a shape not often seen from Patek, although they have been making Tank style watches from nearly one hundred years, this particular model has a more angled and geometric shape to it.  It has the influence of the "Gondolo" reference about it.  As a result of this design it has a real presence on the wrist, even though it is not overly large, and is very thin, it still sits well.  The reference of the watch is the 3491, and has a case serial number 2,655,XXX putting the production circa 1960's.  The case is unpolished with signs of light wear.  The dial is original, and not re-finished and has a very attractive set of Arabic numerals applied to the gold dial in black lacquer.  The watch is powered by the ultra thin calibre 175 movement which was based on a ninety year old design by F. Piguet, is still in use today.  This 9 ligne movement has been extensively improved upon by Patek, as one would expect, adding their patented free sprung Gyromax balance and then finished to the levels of the Geneva Seal standard.  This is a very handsome watch that is perfect for the office, or for formal evening attire.