Here is a Breitling Navitimer Cosmonaute Chrono 81600F circa 1991 with a  circular black triple register 24hr dial with arabic hour markers and hands, 41mm stainless steel case with twin pushers. 
It has the original Breitling leather bracelet and buckle and is in very good condition. 
 
*** The pictures may show the reflection of the camera lens, black spots mostly ***

Details:
 
Make: Breitling
Model: Navitimer Cosmonaute Chrono
Reference:  81600 F
Year: 1991
Material: Stainless Steel 
Dimensions: 41 mm
Crystal: Sapphire
Movement: Automatic
Bracelet/Strap: Original Leather 
Box/Papers: No/Yes