Breitling 819 Navitimer

For sale, this very fine example of a 1967-68 Breitling Cosmonaute/ Navitimer Model 819 Serial Number 1348163.The 809 and the 819 were available for purchase at the same time,the 819 wasn't necessarily a replacement for the 809 but offered the customer an alternative in design.
The 819 Cosmonaute/Navitimer is unique in that it  has a 24hr Dial,noon is read at 6 0'clock and midnight at 12 o'clock
As you can see from the pictures the model 819 has a six sided case,a case back that screws down, and an armoured plexi glass. The pushers and winding crown are similar to the 806.The dial is the only interchangeable part as the 809 and the 819 use the same Venus 178 movement. The slide rule looks the same but has a different mechanism for rotating the bezel.
The stainless steel case is free of dents and scratches,the case back has fine marks and these cannot be erased for fear of losing the serial number and other markings,unfortunately and on most of the pre 1980's Breitlings the markings were not deep enough to withstand much polishing,all the markings on this watch are still present.