Perform precision assembling or adjusting, within narrow tolerances, of timing devices, such as watches, clocks, or chronometers.

• Assembler
• Assembler, Watch Train
• Banking Pin Adjuster
• Barrel Assembler
• Barrel-Bridge Assembler
• Barrel-Endshake Adjuster
• Chronometer Assembler and Adjuster
• Chronometer-Balance-and-Hairspring Assembler
• Hairspring Assembler
• Hairspring Vibrator
• Pallet-Stone Inserter
• Pallet-Stone Positioner
• Timing Adjuster
• Watch Assembler

• Adjust sizes or positioning of timepiece parts to achieve specified fit or function, using calipers, fixtures, and loupes.
• Assemble and install components of timepieces to complete mechanisms, using watchmakers' tools and loupes.
• Bend inner coils of springs away from or toward collets, using tweezers, in order to locate centers of collets in centers of springs, and to correct errors resulting from faulty colleting of coils.
• Bend parts, such as hairsprings, pallets, barrel covers, and bridges, to correct deficiencies in truing or endshake, using tweezers.
• Change timing weights on balance wheels to correct deficient timing.
• Clean and lubricate timepiece parts and assemblies, using solvents, buff sticks, and oil.
• Disassemble timepieces such as watches, clocks, and chronometers so that repairs can be made.
• Estimate spaces between collets and first inner coils in order to determine if spaces are within acceptable limits.
• Examine and adjust hairspring assemblies to ensure horizontal and circular alignment of hairsprings, using calipers, loupes, and watchmakers' tools.
• Examine components of timepieces such as watches, clocks, or chronometers for defects, using loupes or microscopes.
• Mount hairsprings and balance wheel assemblies between jaws of truing calipers.
• Observe operation of timepiece parts and subassemblies to determine accuracy of movement, and to diagnose causes of defects.
• Replace specified parts to repair malfunctioning timepieces, using watchmakers' tools, loupes, and holding fixtures.
• Review blueprints, sketches, or work orders to gather information about tasks to be completed.
• Test operation and fit of timepiece parts and subassemblies, using electronic testing equipment, tweezers, watchmakers' tools, and loupes.
• Tighten or replace loose jewels, using watchmakers' tools.
• Turn wheels of calipers and examine springs, using loupes, to determine if center coils appear as perfect circles.

• apply cleaning solvents
• examine products or work to verify conformance to specifications
• fabricate, assemble, or disassemble manufactured products by hand
• hand engrave jewelry-related products
• make independent judgment in assembly procedures
• monitor the quantity of assembly output
• precision assemble watches or other timing devices
• read blueprints
• read technical drawings
• read work order, instructions, formulas, or processing charts
• repair digital timing devices
• repair mechanical timing devices
• repair or replace electrical wiring, circuits, fixtures, or equipment
• replace electronic components
• solder electrical or electronic connections or components
• test manufactured products or materials
• use electrical or electronic test devices or equipment
• use engraving techniques
• use precision measuring tools or equipment