This Beautiful watch is a precision instrument from the 70's that is made to help Pilots perform many complex functions.

This watch comes with a complete instruction manual and the original Aviation box.

Topics covered in the manual:

• Operation as an ordinary slide rule

• How to use it for multiplication

• How to use it for division

• How to use it for calculating miles per minute

• How to use it for calculating gasoline consumption

• How to use it for calculating rate of descent/climb

• How to use it for nautical and statute mile conversion