| This field allows for different work environments and conditions that may affect performance. Essential operating conditions that may be present (depending on the work situation, needs of the candidate, accessibility of the item, and local industry and regional contexts) are included. |
Oscillator construction types include one (1) or more of the following: | roskoph nickelglycudurchronometer2, 3, 4 armsbi-metal compensatingannularbalance spring tourbillion |
Oscillator components include one (1) or more of the following: | balance wheelbalance springbalance staffroller roller jewel |
Performance characteristics include one (1) or more of the following: | timing and certified chronometereffects of temperature, shocks, magnetism and position of wear temperature compensation |
Record and document repair includes one (1) or more of the following: | extent and date of repair cost of replacement parttime spent on procedure |
Workshop tools and equipment include the following: | hand tools levers roller removing toolstaking setwatchmaker's lathebalance wheel truing toolpoising tool figure of eight calipersspirit lamppresto roller jewel fitting tool |
Oscillator components include one (1) or more of the following: | balance wheelbalance springbalance staffrollerroller jewel |
Type of construction includes one (1) or more of the following: | balance staff: friction fittedriveted screwedroller: single tabledouble tableincabloc two pieceroller jewel shape: D shapetriangular ellipticalbalance spring: flatovercoilhelicalspherical conical |
Wear and damage includes one (1) or more of the following: | balance staff pivots bent, scored or wornbalance wheel out of true, damaged or enlarged holeroller tables deformed or damagedroller jewel cracked, chipped or missingbalance spring centred flat, at the cock and collet |
Appropriate repair process includes one (1) or more of the following: | consideration of component cost and availabilityreplace balance complete and balance staffrepair or replace balance spring and rollerdismantling and reassembling techniquesinspections adjustments of componentslubrication techniques, type and quantityuse of stop oil treatments |
Type and method of balance staff removal and replacementincludes one (1) or more of the following: | friction fitrivetedscrewedturning rivet/hub on latheknock out staking set grinding molfre tool shock-resistance |
Correct operation includes one (1) or more of the following: | balance staff secure fitting/tightnessroller aligned and securebalance wheel true and static poisedbalance spring stud location in-beatbalance spring adjusting and balance staff end shakes |
Type of roller and roller jewel includes one (1) or more of the following: | single and double tables two piece, shock-resistanceD shaped, triangular or elliptical roller jewels |
Components of shock protection devices include one (1) or more of the following: | jewelsendstonescombined setting shock spring |
Watch performance includes one (1) or more of the following: | in-beat 0.5 msamplitude (minimum 220 – 270 degrees, variations in positional errors)rate +/- 5 – 10 seconds a day |