johnswatch1
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Part two - cracking the back
My master watchmaker, George, agreed to take apart the movement with me. This not only offers me some moral support, but for the forensic work we want to do, it’s so much better to have another person to discuss findings with. To prevent further damage to the slot, I use a proper case back opener.
Let's see the famed 12"'120 movement.
A thing of beauty, with the Geneva seal well earned. Great Cote de Geneve finish, but I note that the screw heads are quite badly damaged. The screw on the fourth wheel cock stands slightly proud of the cock, and probably isn’t original.
The dial has some damage, but considering the age, it’s in good condition.
Now I can safely remove the hands.
Note the little groove in the case at 4:30 – this gives you access so you can lift off the dial without having to take the movement out. I like the thinking behind this feature – it makes my work easier and less risky, and somebody thought about that. For me, this is part of haute horlogerie.
[John - I'm interested in t he experts opinion on the originality of the dial. My watchmaker thinks it's original and it looks good to me but I defer to your better judgement!]
The dial even has its own serial number
Now we're ready to remove the movement from the case.
Deep inside a Calatrava - preamble
Most of us only experience haute horlogerie through a sapphire case back and while we are promised amazing finishing throughout the whole watch we for obvious reasons cant verify this for ourselves. Having acquired a ref 96 from 1943 with an unknown serv...
Part one - external appraisal
Normal 0 false false false EN-US JA X-NONE It doesn’t get much more exciting for me than this – a Patek Philippe on the bench! John from Malta sent this watch in for a service, and I’m more than happy to oblige. In my book, watches don’t get better than t...
Part two - cracking the back
My master watchmaker, George, agreed to take apart the movement with me. This not only offers me some moral support, but for the forensic work we want to do, it’s so much better to have another person to discuss findings with. To prevent further damage to...
Part three - the teardown
I just love how the bridges and cocks form a wave throughout the movement. It also separates the functions out nicely, and makes it easy to see how the movement works. Just stunningly beautiful. From here on, I use a movement holder to properly secure it....
Part four - the wheel train
Now on to the wheel train. The 12"'120 movement is beautiful in that it allows you to see the full transmission of power from the barrel (first wheel) through the centre wheel, third wheel, fourth wheel then to the escape wheel and balance. Notice the lit...
Now some questions...
First - do you think the dial is original? I'm not one of those collectors that likes to see battle scars so unless the dial is the one it originally shipped with I'll have it refinished. This is a watch that gets worn daily, not a museum piece. With that...
Great post. Thanks John
My opinion FWIW 1. Dial looks original and I would not refinish it 2. I would get the dent on the case fixed All in all a great watch Thanks Julian
I gets my vote for post of the year
I have no idea what I could add to such a nice post so I better shut up But I really, really, REALLY enjoyed this post. Thanks
Dear John: thank you so much for sharing...
... this beautiful post and exchange of information between you and your knowledgeable watchmaker. Not being myself a PP collector (though definitively I´m an admirer of the brand) and not having much technical knowledge about movements, I enjoyed so much...
I would...
Hi John, I am pretty sure the dial is in original condition - I would not restore it. The damage on the case should be an easy fix - go for it. The Calatrava is an all time classic design, Ref. 96 is a bit small - I have the larger Ref 570 which is the pe...
I've decided to..
Thanks Erich, The screws are fairly badly scratched so I'm having these poished along with a light polish of the regulator. The dent is going to be fixed and the hands lightly polished to remove the marks acquired over at least 6 previous services. I'm ex...
Great post ! Thanks !
Really a cool post, very interesting and very good pictures. I am looking very much forward to see the "reverse" process or at least the the finished piece. Best regards Georg