Breitling Navitimer 806

Breitling Navitimer Chronograph stainless steel gentleman's wristwatch, ref. 806, circa 1972, serial no. 1394xxx, inner rotating slide rule bezel, black dial with Arabic twelve, baton markers, silvered subsidiary hour, thirty minute and constant seconds dials, chronograph centre seconds, signed Venus cal. 178 17 jewel unadjusted movement, signed case, black leather strap, 40mm, Box and Papers - no box or papers. Movement - currently functioning. Dial - typical light marks and wear as expected for the period - see image. Glass - light marks present. Hands - good. Case - surface marks and light scratches to the case back see image for guidance. Crown - Breitling crown adjusting correctly. Strap - good, non-Breitling.