Breitling Unitime 1765

Rare Breitling Unitime chronograph stainless steel gentleman's wristwatch, ref. 1765, circa 1969, serial no. 127xxxx, rotating black bezel, the circular black dial with Arabic twenty-four hour numerals, chronograph centre seconds and triple subsidiary dials, 17 jewel Venus cal. 178 manual wind movement, black leather strap, bezel 42.5mm diameter (at fault)Estimate , £10000 - £12000, Rare Breitling Unitime chronograph stainless steel gentleman's wristwatch, ref. 1765, circa 1969, serial no. 127xxxx, rotating black bezel, the circular black dial with Arabic twenty-four hour numerals, chronograph centre seconds and triple subsidiary dials, 17 jewel Venus cal. 178 manual wind movement, black leather strap, bezel 42.5mm diameter (at fault)