DECENT CONDITION, GOOD CHAIN. I AM NOT SURE HOW IT IS SUPPOSED TO WORK, ESPECIALLY THE SAFETY SWITCH. HERE IS WHAT I FOUND. THE BLACK KNOB IS EVIDENTLY FOR THE SHARPENER, AND ALSO I ASSUME IS THE ALUMINUM PIN AT TOP. THE BLACK TANK IS FOR BAR OIL. INITIALLY, THE TRIGGER DID NOT GO ALL OF THE WAY DOWN FOR THE SAW TO RUN. HOWEVER, WHEN I TURNED IT ON IT'S SIDE, I HEARD A CLICK, AND THE TRIGGER THEN WENT DOWN, AND THE SAW RAN WELL. EACH TIME IT DID THE SAME. NOT SURE IF IT IS DESIGNED THAT WAY, OR THERE SHOULD BE A BUTTON ON THE HANDLE TO PUSH, A SAFETY SWITCH, TO ENGAGE THE MOTOR.