I recently acquired a S&W 686 and would like to know when it was made. After swinging out the yoke the following is seen : Serial number AJMO749. Model number : 686 , no dash. Below that is C11and below that is12986. It has 3 screws. 6 in. barrel.On the barrel is S&W 357 magnum. The barrel has 3 pins with 2 of them holding an adjustable front sight.