Watchmaker interview questions and expert answers

Answer example: First, I document the watch's condition with detailed notes and photographs—critical for vintage pieces. I check the serial number to verify authenticity and determine the exact reference. Before opening the case, I test water resistance and note any external condition issues. Once opened, I examine the movement for corrosion, wear and previous service work quality. With a 1960s Submariner, I'm looking specifically at the crown tube seals, mainspring condition and pallet stones. I completely disassemble the movement, ultrasonically clean each component except the mainspring and inspect under magnification. I replace the mainspring, crown seals and any worn components—crucially, I source period-correct parts or NOS (new old stock) to maintain value. After reassembly with proper lubrication at eight different points, I regulate to within +/-2 seconds per day across five positions. The entire service takes 15-20 hours over two weeks, allowing proper testing time.

Answer example: I work extensively with mechanical movements including manual wind and automatic calibers. I have experience with various complications including chronographs, moon phases, and perpetual calendars. I also work with quartz movements and hybrid systems. I understand the differences between Swiss, German, and Japanese movements and can service each according to their specific requirements.

Answer example: Regulation is both science and art. I use a timing machine to measure rate in six positions: dial up, dial down, crown up, crown down, crown left and crown right. The goal is minimal variation between positions—ideally under 6 seconds total. I begin with the movement fully wound and adjust the regulator pins to achieve approximately +5 seconds per day dial up. Then I check other positions. If crown down shows -3 while dial up shows +5, I have an 8-second positional error. I address this by carefully adjusting the stud position or, in extreme cases, the balance poise. I never rush regulation—the movement must run on the timing machine for at least 24 hours in each critical position. Temperature variation matters too, so I may test at different room temperatures. A properly regulated luxury watch should maintain +/-2 seconds daily in real-world wear.

Answer example: I begin by documenting the watch's condition and taking detailed photographs. I disassemble the movement completely, cleaning each component thoroughly. I inspect all parts for wear and replace components as needed. I reassemble with proper lubrication, then regulate and test the movement. I also service the case, crown, and bracelet, ensuring the entire watch functions perfectly.

Answer example: Essential tools include precision screwdrivers, tweezers, and pliers for handling small components. I use timing machines for regulation, cleaning machines for parts, and specialized tools for specific tasks like spring bar removal. I also use magnification equipment and proper lighting. I maintain all tools meticulously and understand how to use each tool effectively.

Answer example: I approach vintage pieces with respect for their historical value and original craftsmanship. I research the timepiece's history and understand the techniques used in its era. I use appropriate methods and materials that match the period. I document all work thoroughly and ensure that any modifications are reversible. Preservation of historical value is as important as functional restoration.

Answer example: Column-wheel and cam-actuated chronographs have fundamentally different architectures that affect both servicing approach and user experience. Column-wheel chronographs, used in high-end pieces like Patek Philippe, use a vertical rotating column with triangular teeth that control start, stop and reset functions. During service, I pay special attention to the column wheel's engagement points—any wear on those teeth affects the crisp feeling of the pushers. The column wheel itself is expensive to replace, so I inspect it carefully under magnification for any deformation. The horizontal clutch mechanism that engages the chronograph typically uses a friction spring, which I always replace during service as it loses tension over time. Cam-actuated chronographs, common in more affordable Swiss pieces, use a heart-shaped cam system. These are mechanically simpler and more robust—the cam system is less prone to wear. However, the pusher feel is less refined, with a slightly mushier engagement. During service, I focus on the cam profiles and the vertical clutch mechanism. The vertical clutch engages instantaneously with no hand flutter, unlike friction-spring systems. Both types require complete disassembly, but column-wheel chronographs have more small components that must be tracked meticulously. Reassembly timing is critical—the chronograph hand must hit markers exactly, requiring precise adjustment of the chronograph runner.

Answer example: Water resistance requires proper case construction, gasket maintenance, and crown sealing. I test water resistance using specialized equipment and replace gaskets as needed. I understand how different case designs affect water resistance and can recommend appropriate maintenance schedules. I also educate clients about proper care to maintain water resistance.

Answer example: I work with authorized suppliers and manufacturers to source genuine parts whenever possible. For vintage pieces, I may need to fabricate parts or find suitable alternatives. I maintain relationships with various suppliers and understand the importance of using correct parts for each movement. I also document all parts used for future reference.

Answer example: I study new movements and complications, attend workshops and training sessions, and follow industry publications. I learn from master watchmakers and experiment with new techniques while respecting traditional methods. I also examine high-quality timepieces to understand different approaches and stay informed about technological advances in horology.