000.    
A Breguet Garde Temps deck chronometer No. 3787 A.lange Sohne, originally sold to Count Schouvaloff in 1823,000-2, and a power reserve indicator; notably Versace, this timepiece is one of only two watches made by Breguet which features a tourbillon in tandem with a constant force escapement–both original inventions of the master.  Pre-sale estimates are [...]