watchmaker service of an omega seamaster cal 562omega seamaster 166.010 cal 562, serial 23069078...

Reference number: 014-001

Chris Nicholas 29 June 2017 of 35

Worksheet/Receipt

Owners name: Dan

Address: n/a

Telephone: n/a

Description of item(s) received, including accessories:

Omega Seamaster 166.010 Cal 562, serial 23069078 plus BOR bracelet.

Work required based on initial inspection:

Watch runs fine but has not been serviced for two years. New crystal, crown and stem were fitted at that

time.

Full service on movement, to include:

Omega 72205501208 Mainspring

Clean case and bracelet.

I acknowledge receipt of the item(s) described above.

Date: 08 June 2017



As received:



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



Drying chamber 7 minutes drying



Parts after cleaning



Cleanliness and condition review

Jewels, bearings and posts checked in plates and bridges:



Wheels, arbor and other components reviewed – some samples:

Barrel arbor is fine

Second, third, fourth wheel are fine.



Escape wheel is fine.



Review of the keyless works and other dial side items. - all fine.



Review of the automatic mechanism and bridges. Some samples, all fine:



Parts required after review

Parts list:

Omega 562

Omega 5501208 *1 Mainspring



Oiling

Lubricants used:

Moebius 8300 grease Keyless works

Moebius HP1300 oil Typically on all bearing surfaces unless otherwise specified.

Moebius 9010 oil Balance Shock protection end jewels, escape wheel and fourth wheel pivots.

Moebius 9415 grease Pallet jewels.

Moebius 8941 Fixodrop Epilame used for escape wheel and pallet jewels.

Kluber P125 Braking grease for barrel wall.



Assembly

Polishing shock protection jewels on watchmaker’s tissue with a buff stick (stock photo).

Oiled and installed. Balance and cock mounted on the bare plate. Checking concentricity and flatness of

hairspring.



Spring adjusted to be central in regulator pins.



Second wheel fitted with barrel bridge, installing cannon pinion:

Installing keyless works with barrel bridge temporarily fitted – minute wheel installed later as it covers the

third wheel jewel.



Barrel fitted:



Barrel bridge, crown wheel and ratchet wheel fitted.

Train and train bridge fitted.



Fork fitted:

Completed basic movement – now running.

This runs for a few days and I make any adjustments, then fit the centre seconds pinion and tension spring.



Building the calendar mechanism – Parts. The date ring is very stained on the left so, replaced it

Calendar plate fitted to movement with date ring.



Building the automatic bridge and mechanism – winding wheel assembly parts:

All parts fitted to the bridge:



Rotor fitted and bearing checked:



Dial and hands fitted:



Movement fitted to case:

Auto bridge added:



Case back fitted.

Complete and running in the case:



Bracelet cleaned and refitted.



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 25 seconds/day over the three. In the pictures below, you can see that this

movement has a variation from -2.7 to +11.5 seconds/day so that’s well within specification at 14.2

seconds/day. Beat error should be under 0.8ms and here it’s 0.3ms maximum so, again within spec.



As usual I’ve added the other 3 positions as they can be useful in seeing faults or improvements. Ignoring 12H

which is not used for testing a watch performance as it is an unnatural position on the wrist, the five

chronometer testing positions still have a variation of 14.2 seconds/day, still within the 3 positions

specification. This is also a good result for one of these.



Omega also call for these calibres to be tested again after resting for 24 hours from full wind and require a

maximum of 35 seconds/day variation over those same 3 positions and a minimum amplitude of 160°. This

movement has a variation of 5 seconds and a minimum amplitude of 204°over 6 positions so is well within

specification. There’s one other requirement and that’s a minimum power reserve of 38 hours – this

movement has more than 48 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 250-320° horizontal and 240-280° 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 – 19800 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

To see how the movement runs over a test period of some days in various positions. This is supposed to

simulate typical usage and how the watch will run in the real world. I’m using this for this calibre:

• Full wind and 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

• Rested to allow power to run down to check power reserve.

• Auto winder to check charge build from power down.

This doesn’t identify any issues and everything works normally and within specifications and the watch winds

fine by hand and on the auto winder. Average rate over the first five days of the test is +2 seconds/day.



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 higher-

pressure air escapes from the case.

This watch passes that test.



Overall

The movement has been serviced with parts replaced as necessary (virtually nothing here) and performs well,

keeping time well within the requirements for this calibre. Its fastest rate is in 6H position and its slowest

position that is easy to rest in is crown down (9H). By resting in either of these positions overnight, the

timekeeping can be slightly tweaked as required. In my long-term tests which are meant to simulate typical

usage, it is averaging +2 seconds per day. I can’t guarantee that but it is a good result and can be adjusted as

noted.

The watch passes a 30m water resistance test.

The 562 movement has a quick set date and the crown functions in the following manner.

Manual winding of the watch – position 1. Winding can be for an infinite number of crown turns as it’s

an automatic but 20 turns from zero charge is more than sufficient.

Hand setting mode – position 2 by pulling the crown further out. Quick set the date by moving

backwards and forwards between about 9pm and 1 am.

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watchmaker service of an omega seamaster cal 562omega seamaster 166.010 cal 562, serial 23069078...

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