Elgin/Sun Dial Model 5 Grade 179 The Pocket Watch Database’s technical description of the movement based on its serial number Full movement Balance cock and regulator Focus on the balance spring attachment Focus on the impulse pin Focus on the balance screws Movement without the balance wheel Swiss lever visible through the hole in the bridge Barrel bridge removed Gear train bridge removed Swiss lever Swiss lever Escape wheel Mainspring barrel Movement with the escapement and barrel removed Fourth wheel Third wheel Centre wheel Movement with almost all elements removed Click and its spring Dial Blued hand Dial side with dial removed. Setting lever at the top linked by a spring to the setting mechanism Setting mechanism cover