Tudor Pelagos

The introduction of the Tudor Pelagos (and the Black Bay) at Baselworld in 2012 reinforced Tudors ability to get the styling of their watches spot on. Whilst the Black bay was undoubtably inspired by the vintage Tudor divers of the 50’s and 60’s the Pelagos was much more up to date with it’s titanium case, 500m depth rating with just a nod to the traditional with it’s snowflake hands. Both watches were instant successes with people clamouring for both models in equal measures. The original Pelagos is powered by a slightly breathed on and decorated ETA2824-2, the new Pelagos which was introduced at this years Baselworld has an in house movement, the MT5612. This is hardly surprising with Swatch Group controversially cutting off the supply of ETA movements to manufacturers and parts to independent repairers (me!) at the end of this year. This Pelagos came in with an interesting problem, when manually wound the spring made a loud slipping noise almost as though the spring was broken near the barrel wall.

Tudor Pelagos ETA2824-2

Whilst the case is manufactured from lightweight titanium, the caseback appears to be made from stainless steel judging by the weight.

Tudor Pelagos ETA2824-2

With the back removed the ETA 2824-2 movement can be seen in all it’s glory. There’s a lot of finishing work that’s been applied to the plates and bridges in the form of perlage and Geneva stripes.

Tudor Pelagos ETA2824-2

The first job is to remove the signed oscillating weight, this gives a clear view of the autowind mechanism which is the next thing to be removed.

Tudor Pelagos ETA2824-2

Here’s a view of the underside of the autowind plate, the two wheels to the right of the picture are the reverser wheels. These convert the motion of the oscillating weight into constant winding of the mainspring, regardless of the whether the weight is rotating clockwise or anticlockwise.

Tudor Pelagos ETA2824-2

The movement is then uncased and the dial and handset is removed.

Tudor Pelagos ETA2824-2

With the dial removed work can start on stripping this side.

Tudor Pelagos ETA2824-2

I removed the date disk first….

Tudor Pelagos ETA2824-2

….then proceeded to strip the calendar work….

Tudor Pelagos ETA2824-2

….and finally the keyless work.

Tudor Pelagos ETA2824-2

The watch was turned over and I started with the barrel bridge and barrel.

Tudor Pelagos ETA2824-2

The balance work was next to go.

Tudor Pelagos ETA2824-2

Finally the bridges and wheel trains came off.

Tudor Pelagos ETA2824-2

This meant all the components were now ready for cleaning and inspection.

Tudor Pelagos ETA2824-2

Tudor Pelagos ETA2824-2

I was expecting a broken maispring in this watch but when I removed it it actually looked to be in good shape, as did the arbor and barrel. The mainspring was replaced anyway as there was obviously a fault in that area causing the slipping.

Tudor Pelagos ETA2824-2

Tudor Pelagos ETA2824-2

The rebuild continued with the barrel and second wheel.

Tudor Pelagos ETA2824-2

The bridge and wheel train were next to be refitted.

Tudor Pelagos ETA2824-2

The balance was fitted and some power applied which allowed the rough adjustment of the beat and regulation.

Tudor Pelagos ETA2824-2

The regulator and beat lever on these Tudors are linked together and the adjustment between them is carried out by rotating the worm screw on the beat lever. The balance bottom jewel is ready to be fitted in this picture.

Tudor Pelagos ETA2824-2

The movement was turned over and assembly continued….

P1040709a

….until I could refit the dial and hands.

Tudor Pelagos ETA2824-2

The movement was recased….

Tudor Pelagos ETA2824-2

….and the autowind mechanism and oscillating weight were refitted.

Tudor Pelagos ETA2824-2

The watch was then fully wound and placed on the final test machine. After four days of checking and a couple of small adjustments it was ready to go back to the customer. I gave it a final wind and lo and behold I heard that damn spring slipping again! The only other culprit is a worn barrel wall but when I’d inspected it the surface looked great and the scallops were well defined. I wondered if a stronger braking grease would sort out the slipping so I ordered some Mobius 8213 which offers a strong braking effect, but I also ordered a replacement complete barrel just in case! When the parts arrived I stripped the barrel, cleaned it and the mainspring thoroughly and applied the 8213 grease.

Tudor Pelagos ETA2824-2

Once reassembled the slipping was still there so it was stripped once more and the barrel changed for the new one.

P1040917a

Unsurprisingly this had the desired effect and the noisy slipping was no more! The watch was closed up tightly with a smattering of silicone grease on the o-ring surfaces to make it ready for a leak test.

Tudor Pelagos ETA2824-2

Tudor Pelagos ETA2824-2

Tudor Pelagos ETA2824-2

The watch passed this without issue and was now ready to go back to the owner. The barrel problem had me scratching my head a for a bit but it just goes to show that even when parts look fine during inspection it only takes an imperceptible imperfection to cause a big problem. I think you’ll agree the Pelagos is a very purposeful looking watch, I like it a lot!

Tudor Pelagos ETA2824-2

Tudor Pelagos ETA2824-2

Tudor Pelagos ETA2824-2

4 comments

  1. In my opnion it is better than the sister Rolex of the same model. Why yuou may ask?

    Firstly,
    the case!!!! If the mid case is Titanium and the case back is stainless steel, it is a plus, plus, because it has no chance of galling and so there is never going to be an issue with the case fusing as it happens with both components of the same metals.

    Like Gold, Titanium is corrison resistant and it does not rust like stainless steel. Titanium is lalso ight and hard.

    Secondly,
    the eta 2824 movement!!!! Parts are available from most watchmakers and to service it, can be done at any watchmaker who usually have a sea of eta parts. You can buy a new genuine eta movement for just under 300 Pounds.

    Find a Rolex submariner with the above positives. Worse still it costs more!!!!!

    Like

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