Battery Replacement: Change batteries without damaging the case or movement, including handling pop-off, screw-down, and case backs with screws. 

Tool Maintenance: Keep all watchmaker tools in good working condition and maintain a neat and clean workspace. 

Micrometer Usage: Correctly use a micrometer to ensure precise measurements and adjustments. 

Pressure Testing: Perform pressure tests to ensure water resistance, understanding the various tests and diagnosing issues to repair cases as needed. 

Movement Setting: Set perpetual calendar movements accurately and ensure proper functionality. 

Stone Setting: Set foil back stones with precision and care. 

Movement Changes: Change 2-3 hand and chronograph movements efficiently, ensuring all components are correctly assembled. 

Crystal Replacement: Replace watch crystals and ensure that the watch will pass a pressure test. 

Pin Replacement: Replace all types of pins in watch bands and cases, maintaining structural integrity and aesthetics. 

Cleanliness and Precision: Keep dials and hands clean and dust-free during disassembly and reassembly to maintain optimal watch performance. 

Part Sourcing: Identify movement numbers or case back numbers to source necessary parts for repairs and maintenance.