Worksheet/Receipt Depositors name: Address:

Transcription

1 Owners name: Address: Worksheet/Receipt Depositors name: Address: Telephone: Description of item(s) received, including accessories: Telephone: Omega Seamaster Calendar, black dial, calibre 503 gold cap case. Beads of Rice gold plated bracelet Work required based on initial inspection: Full service on movement, to include: Mainspring Crown and stem Case seal Clean case and bracelet. I acknowledge receipt of the item(s) described above. Date: 31 March 2017 Chris Nicholas 07 April 2017 Page 1 of 39

2 As received: Chris Nicholas 07 April 2017 Page 2 of 39

3 Watch runs with reasonable accuracy but amplitude at full wind is poor. Chris Nicholas 07 April 2017 Page 3 of 39

4 Case back removed and movement is nicely coloured: Chris Nicholas 07 April 2017 Page 4 of 39

5 Dial and hands in good condition with even patina. Dial side of movement complete and little marked. Chris Nicholas 07 April 2017 Page 5 of 39

6 Jewels are very dirty and all movement has dirt and dried oil plus excess oil in places. Chris Nicholas 07 April 2017 Page 6 of 39

7 Disassembly and cleaning Movement fully disassembled, jewels pegged and all parts cleaned in Elmasolvex RM 4 jar automatic cleaning machine: Jar 1: Cleaning Elma WF Pro 5 minutes clean + 2 minutes spin off Jar 2: Rinse 1 Elma Suprol Pro 3 minutes rinse + 2 minutes spin off Jar 3: Rinse 2 Elma Suprol Pro 3 minutes rinse + 2 minutes spin off Jar 4: Rinse 3 Elma Suprol Pro 3 minutes rinse + 2 minutes spin off Drying chamber 7 minutes drying Chris Nicholas 07 April 2017 Page 7 of 39

8 Parts after cleaning. Lot of parts in a calibre 503. Chris Nicholas 07 April 2017 Page 8 of 39

9 Cleanliness and condition review Jewels, bearings and posts checked in plates and bridges: Chris Nicholas 07 April 2017 Page 9 of 39

10 Chris Nicholas 07 April 2017 Page 10 of 39

11 Wheels, arbor and other components reviewed some samples: Barrel arbor is fine Second, third, fourth wheel are fine. Chris Nicholas 07 April 2017 Page 11 of 39

12 Chris Nicholas 07 April 2017 Page 12 of 39

13 Escape wheel is fine. Pallet fork has corrosion, pivots are worn and pallet stone alignment is not good so, replaced with new at upper (pre cleaning). Chris Nicholas 07 April 2017 Page 13 of 39

14 Friction spring is damaged and will hurt the amplitude so is replaced (shown next to a new one at upper) Review of the keyless works and other dial side items. Some samples, all fine. Chris Nicholas 07 April 2017 Page 14 of 39

15 Parts required after review Parts list: omega 503.pdf omega 500.pdf Generale Ressorts GR2922X *1 Mainspring generic as I cannot get Omega ones Omega *1 Friction spring for centre seconds pinion Omega *1 Pallet fork Omega *1 Stem Omega 42023SX*1 Crown in GP Case back seal Chris Nicholas 07 April 2017 Page 15 of 39

16 Oiling Lubricants used: Moebius 8300 grease Moebius HP1300 oil Moebius 9010 oil Moebius 9415 grease Keyless works Typically on all bearing surfaces unless otherwise specified. Balance Shock protection end jewels, escape wheel and fourth wheel pivots. Pallet jewels. Moebius 8941 Fixodrop Epilame used for escape wheel and pallet jewels. Kluber P125 Braking grease for barrel wall. Chris Nicholas 07 April 2017 Page 16 of 39

17 Assembly Polishing shock protection jewels on watchmaker s tissue with a buff stick (stock photo). Oiled and installed. Chris Nicholas 07 April 2017 Page 17 of 39

18 Oddly, the previous watchmaker left the boot open on the hairspring regulator. This is not a big issue as it s really there to stop the next coil catching up in the regulator pins after a knock but, it gets closed later. Balance and cock are mounted on the bare plate for checking concentricity and flatness of hairspring. Spring adjusted to be central in the regulator pins. Chris Nicholas 07 April 2017 Page 18 of 39

19 Reducing end shake in barrel lid New spring Fitted and shown before closing. Chris Nicholas 07 April 2017 Page 19 of 39

20 Installing keyless works minute wheel installed later as it covers the third wheel jewel. Turned over, barrel fitted. Chris Nicholas 07 April 2017 Page 20 of 39

21 Barrel bridge and second wheel fitted and train bridge fitted temporarily to support second wheel: Pressing on cannon pinion Chris Nicholas 07 April 2017 Page 21 of 39

22 Train fitted and oiled: Turned over, minute wheel fitted: Chris Nicholas 07 April 2017 Page 22 of 39

23 Crown wheel and click spring fitted: These are the many parts that make up the ratchet wheel it needs to work with the crown wheel for hand winding and the auto mechanism for auto winding. The wheels are free to turn in one direction so that the auto winder is not trying to undo the spring. Chris Nicholas 07 April 2017 Page 23 of 39

24 Assembled and installed. Fork installed Chris Nicholas 07 April 2017 Page 24 of 39

25 Balance re-installed and base movement running. Chris Nicholas 07 April 2017 Page 25 of 39

26 Calendar parts Installed. Chris Nicholas 07 April 2017 Page 26 of 39

27 Building the automatic bridge and mechanism winding wheel assembly parts: Reverser sub assembly from some of the above: Chris Nicholas 07 April 2017 Page 27 of 39

28 All parts fitted to the bridge: Chris Nicholas 07 April 2017 Page 28 of 39

29 Bridge and then rotor temporarily fitted to base movement to check function. Chris Nicholas 07 April 2017 Page 29 of 39

30 Dial fitted: Second hand pipe was a little loose so, tightened with the hand tightening tool. Chris Nicholas 07 April 2017 Page 30 of 39

31 Hands fitted. Chris Nicholas 07 April 2017 Page 31 of 39

32 I prefer to fit these calibres to the case without the auto movement and put that on later. New crown and stem. Chris Nicholas 07 April 2017 Page 32 of 39

33 Auto bridge and rotor fitted. Stem needs trimming to length. Internals finished Chris Nicholas 07 April 2017 Page 33 of 39

34 Inside of case back. Case back fitted to case with new seal. Chris Nicholas 07 April 2017 Page 34 of 39

35 Timing and testing Omega call for these calibres to be tested over 3 positions: CH (dial up); 9H and 6H and specify a maximum rate variation at full wind of 40 seconds/day over the three. In the pictures below, you can see that this movement has a variation from -2.4 to seconds/day so that s well within specification at 19 seconds/day. Beat error should be under 0.8ms and here it s 0.3ms maximum so, again within spec. Chris Nicholas 07 April 2017 Page 35 of 39

36 As usual I ve added the other 3 positions as they can be useful in seeing faults or improvements and all six have a variation of 25 seconds/day, still well within the 3 positions specification. This is a good result for this calibre. Chris Nicholas 07 April 2017 Page 36 of 39

37 Omega also call for these calibres to be tested again after resting for 24 hours from full wind and require a maximum of 50 seconds/day variation over those same 3 positions and a minimum amplitude of 180. This movement has a variation of 11 seconds and a minimum amplitude of 209 over 6 positions so is well within specification. There s one other requirement and that s a minimum power reserve of 32 hours this movement has more than 40 hours so is fine. Note: This calibre has a lift angle of 49. Just some notes on how to read these graphs: Positions CH FH (CB) 6H 9H 3H 12H The lines should be smooth without undulations. Along the top are: o The rate in seconds per day. o The beat error basically the time difference between tick-tock and tock-tick. o The amplitude of the balance ideally horizontal and in others at full wind but dependant on movement age/condition - higher is usually better. Many specs only call for a minimum amplitude after 24 hours. Along the bottom are: o Mode of the tester at both left and right. o The beat number: calibre dependant A/h is equal to a 2.75 Hz. o Lift angle: calibre dependent and is used for amplitude calculation. If specified incorrectly high, it overestimates the balance amplitude by about 6 for a 1 increase in lift angle. Longer term running test I run some standard tests to see how the movement performs over a test period of some days in various positions. I m using this for this calibre: Full wind Set time Day 1: 24 hours rested in 9H position Day 2: 24 hours on auto winder Day 3: 24 hours rested in dial up position Day 4: 24 hours on auto winder Day 5: 24 hours rested in 6H position Full wind Day 6 and 7: Rested to allow power to run down. Day 8: Auto winder to check charge build from power down. This doesn t identify any issues and everything works normally and within specifications. Timekeeping over days 1 to 5 averages at +5 to +6 seconds per day. The watch winds fine by hand and on the auto winder. Chris Nicholas 07 April 2017 Page 37 of 39

38 Water resistance test to 30m The test is made by pressurising the tester to 3.75 bar (approx. 37.5m water depth) which is 3 bar (30m) plus a 25% safety factor. After an hour with the watch sitting in the air part of the chamber at that pressure, the watch is submerged and the pressure released over 10 seconds. If the watch has leaked during it s one hour soak, then the internal pressure will be higher than the external and air bubbles will be seen as the higherpressure air escapes from the case. This watch passes that test. Chris Nicholas 07 April 2017 Page 38 of 39

39 Overall The movement has been serviced with parts replaced as necessary and performs well, keeping time well within the requirements for this calibre and a power reserve higher than the minimum. Its fastest rate is in crown down (9H) position and its slowest is in the crown up (3H) position. By resting in either of these two positions overnight, the timekeeping can be slightly tweaked as required. The watch passes a 30m water resistance test and so, is splash proof at this time. The quick set date is between about 9 pm and 1 am so, cycling between those positions advances the date quickly. Return to Chris Nicholas 07 April 2017 Page 39 of 39