CW21 Certification – Precision
Timing V2.0 Advanced
Comprehensive Examination
Bank well written by best
examiners in the world
2026/2027 direct pass !!!
September 21–25 | Harrison, Ohio | Watchmaking
Table of Contents
1. Measurement Physics & Instrumentation (Questions 1–15)
2. Advanced Escapement Dynamics (Questions 16–30)
3. Hairspring Mechanics & Retouching (Questions 31–45)
4. Balance Poising & Dynamic Adjustments (Questions 46–60)
5. Isochronism & Positional Compensation (Questions 61–75)
6. Lubrication Science & Tribology (Questions 76–90)
7. Power Transmission & Torque Analysis (Questions 91–105)
8. Diagnostic Protocols & Failure Analysis (Questions 106–120)
9. Chronometric Standards & Certification (Questions 121–135)
10. Complex Scenario-Based Troubleshooting (Questions 136–150)
,Section 1: Measurement Physics & Instrumentation
🟢 1. In timing machine operation, what does the “lift angle” parameter physically
represent?
A. The angle of the pallet fork’s impulse plane
B. The angle through which the balance travels during unlocking and impulse
C. The angle of the hairspring’s terminal curve
D. The angle of the escape wheel’s locking face
🔴 B. The angle through which the balance travels during unlocking and impulse
Rationale: Lift angle is the angular measurement during which the balance receives and
transmits impulse through the escapement, essential for accurate amplitude calculation.
🟢 2. A Witschi Chronoscope M1 measures amplitude with a specified resolution of:
A. 5°
B. 2°
C. 1°
D. 0.5°
🔴 C. 1°
Rationale: The Chronoscope M1 specification sheet indicates amplitude resolution of 1°
with a measurement range of 60° to 360°.
,🟢 3. The “Spe4” measurement mode on Witschi timing machines is specifically
designed for:
A. Coaxial escapements
B. AP escapements
C. Swiss lever escapements with specific amplitude filtering
D. Quartz watch rate measurement
🔴 C. Swiss lever escapements with specific amplitude filtering
Rationale: Spe4 mode applies a specific amplitude filter optimized for Swiss lever
escapements, distinct from the standard Stnd mode.
🟢 4. What does the “Scope” function on a Witschi Chronoscope M1 display?
A. A graphical representation of rate over time
B. The acoustic signal of the escapement for analysis
C. A Fourier transform of amplitude variations
D. A statistical analysis of beat error
🔴 B. The acoustic signal of the escapement for analysis
Rationale: The Scope function displays the raw acoustic signal in various time bases
(20ms, 200ms, 400ms) for detailed escapement sound analysis.
🟢 5. The fundamental principle of timing machine measurement relies on:
A. Optical tracking of the balance wheel
B. Acoustic detection of escapement sounds
, C. Magnetic sensing of the mainspring
D. Visual observation through a microscope
🔴 B. Acoustic detection of escapement sounds
Rationale: Timing machines use acoustic signal transducers (microphones) to detect and
analyze the sounds produced by the escapement during unlocking, impulse, and locking
phases.
🟢 6. The “unlocking” sound in the escapement acoustic signature represents:
A. The moment of impulse delivery
B. The instant the pallet stone releases the escape wheel tooth
C. The drop of the escape wheel onto the locking face
D. The beat error correction
🔴 B. The instant the pallet stone releases the escape wheel tooth
Rationale: Unlocking is the first significant sound, occurring when the pallet stone slides
off the escape wheel tooth’s locking face, initiating the impulse cycle.
🟢 7. A timing machine set to measure a watch with an incorrect lift angle will produce:
A. Incorrect rate but correct amplitude
B. Incorrect amplitude but correct rate
C. Incorrect both rate and amplitude
D. No effect on either measurement
🔴 B. Incorrect amplitude but correct rate
Timing V2.0 Advanced
Comprehensive Examination
Bank well written by best
examiners in the world
2026/2027 direct pass !!!
September 21–25 | Harrison, Ohio | Watchmaking
Table of Contents
1. Measurement Physics & Instrumentation (Questions 1–15)
2. Advanced Escapement Dynamics (Questions 16–30)
3. Hairspring Mechanics & Retouching (Questions 31–45)
4. Balance Poising & Dynamic Adjustments (Questions 46–60)
5. Isochronism & Positional Compensation (Questions 61–75)
6. Lubrication Science & Tribology (Questions 76–90)
7. Power Transmission & Torque Analysis (Questions 91–105)
8. Diagnostic Protocols & Failure Analysis (Questions 106–120)
9. Chronometric Standards & Certification (Questions 121–135)
10. Complex Scenario-Based Troubleshooting (Questions 136–150)
,Section 1: Measurement Physics & Instrumentation
🟢 1. In timing machine operation, what does the “lift angle” parameter physically
represent?
A. The angle of the pallet fork’s impulse plane
B. The angle through which the balance travels during unlocking and impulse
C. The angle of the hairspring’s terminal curve
D. The angle of the escape wheel’s locking face
🔴 B. The angle through which the balance travels during unlocking and impulse
Rationale: Lift angle is the angular measurement during which the balance receives and
transmits impulse through the escapement, essential for accurate amplitude calculation.
🟢 2. A Witschi Chronoscope M1 measures amplitude with a specified resolution of:
A. 5°
B. 2°
C. 1°
D. 0.5°
🔴 C. 1°
Rationale: The Chronoscope M1 specification sheet indicates amplitude resolution of 1°
with a measurement range of 60° to 360°.
,🟢 3. The “Spe4” measurement mode on Witschi timing machines is specifically
designed for:
A. Coaxial escapements
B. AP escapements
C. Swiss lever escapements with specific amplitude filtering
D. Quartz watch rate measurement
🔴 C. Swiss lever escapements with specific amplitude filtering
Rationale: Spe4 mode applies a specific amplitude filter optimized for Swiss lever
escapements, distinct from the standard Stnd mode.
🟢 4. What does the “Scope” function on a Witschi Chronoscope M1 display?
A. A graphical representation of rate over time
B. The acoustic signal of the escapement for analysis
C. A Fourier transform of amplitude variations
D. A statistical analysis of beat error
🔴 B. The acoustic signal of the escapement for analysis
Rationale: The Scope function displays the raw acoustic signal in various time bases
(20ms, 200ms, 400ms) for detailed escapement sound analysis.
🟢 5. The fundamental principle of timing machine measurement relies on:
A. Optical tracking of the balance wheel
B. Acoustic detection of escapement sounds
, C. Magnetic sensing of the mainspring
D. Visual observation through a microscope
🔴 B. Acoustic detection of escapement sounds
Rationale: Timing machines use acoustic signal transducers (microphones) to detect and
analyze the sounds produced by the escapement during unlocking, impulse, and locking
phases.
🟢 6. The “unlocking” sound in the escapement acoustic signature represents:
A. The moment of impulse delivery
B. The instant the pallet stone releases the escape wheel tooth
C. The drop of the escape wheel onto the locking face
D. The beat error correction
🔴 B. The instant the pallet stone releases the escape wheel tooth
Rationale: Unlocking is the first significant sound, occurring when the pallet stone slides
off the escape wheel tooth’s locking face, initiating the impulse cycle.
🟢 7. A timing machine set to measure a watch with an incorrect lift angle will produce:
A. Incorrect rate but correct amplitude
B. Incorrect amplitude but correct rate
C. Incorrect both rate and amplitude
D. No effect on either measurement
🔴 B. Incorrect amplitude but correct rate
