A professional who examines unassembled hairsprings for flatness and concentricity, using tweezers and loupe. Responsibilities include:

• Stretches spring to ensure specified plane and spacing between coils, using tweezers.
• Examines spring to detect defects, such as blemishes and bent or short tongues, using loupe.
• Segregates standard and defective springs in boxes for salvage, storage, and shipping.
• Records inspection data for identification purposes.