Complications
Small-luxury-world presents a compelling look at the Patek Philippe Ref. 5550P Advanced Research Perpetual Calendar, a timepiece that integrates cutting-edge technology with traditional haute horology. This article offers live pictures and personal reflections on a watch that, despite being introduced in 2011, continues to captivate collectors with its innovative features. The author highlights key technical advancements and shares his impressions, inviting readers to appreciate this unique Patek Philippe reference.
It was already introduced in 2011 and we have seen it here
several times. Our dear Dje wrote an interesting post about it
(April 2011;
please use our search function if you are interested in more technical
details).
There have been some more posts here and additionally I was reading about the watch in several magazines, press text and so on.
How could it happen that I missed two things – at least?
Let´s start from the beginning 
Technical (key) features :
GyromaxSi balance wheel
Pulsomax escapement
Spiromax balance spring
GyromaxSi + Pulsomax + Spiromax=Oscillomax
One of the benefits is a plus of 50% power reserve, compared to a regular cal. 240 Q.
The movement looks like something well-known for PP connoisseurs, except the new “high tech features”.
Anything else?
Well, let´s compare the Ref. 5550 with another perpetual calendar/family member the Ref. 5140.
Once more, anything else to observe?
5550
5140
No, I don´t talk about the “loupe”.
What I totally missed so far is …
… the different shape of the balance cock.
Of course it is just a tiny detail, but we talk about Haute Horlogerie and therefore tiny details make huge differences – quite often.
Doesn´t it look more vintage and/or sophisticated? An Advanced Research watch with a “vintage style” balance cock.
Nothing
was mentioned about in the official press text, but for sure it was part of
their requirements specification.
I really like that kind of attention to
details, by Patek Philippe.
On more comparison – dial side.
Ref. 5550 - the silvered brushed finish of the dial is just beautiful and
we have seen it at other Advanced Research
watches before. The gold indexes and
hands complement the dial very well. Once more, "vintage" comes to my mind.
In my book I prefer the luminous hands over the Dauphine hands and not only because of readability, at night.
I was aware of the latter details, but I was not aware what would happen when I put it on my wrist.
What do you think, what happened?
Surprise, surprise I fall in love with a perpetual calendar. Me, who just claimed that he is not seriously interested in that complication.
The size was perfect on my wrist and the charm was just soooo addictive. It was almost impossible to take it away from my wrist.
So what I was missing so far is the different shape of the balance cock and the very addictive charm in general.
Never say, never … and never ever
judge a watch until you saw it on your wrist
Oliver
The Patek Philippe Reference 5140 is a perpetual calendar wristwatch, succeeding the highly regarded Reference 3940. It maintains the classic Patek Philippe perpetual calendar layout, featuring day, date, month, leap year, and moon phase indications. The 5140 was introduced with a slightly larger case diameter than its predecessor, reflecting contemporary preferences while retaining a traditional aesthetic.
This reference is powered by the ultra-thin self-winding Caliber 240 Q, known for its micro-rotor construction which allows for a slender case profile. The movement provides a power reserve of 48 hours. The watch is presented in 18k white gold, rose gold, or yellow gold cases, measuring 39 mm in diameter, and is fitted with a sapphire crystal. It offers water resistance to 30 meters.
The 5140 appeals to collectors seeking a modern perpetual calendar with a direct lineage to Patek Philippe's established complications. Its production run from 2006 to 2019 saw various dial configurations, including opaline and silvery finishes. The watch is typically paired with a leather strap and a deployant clasp, consistent with Patek Philippe's classic offerings.
Indeed this watch looks so much different in the metal, and also different on the wrist :) Basically, your pics are great, some of the best, but they give just a small idea of how wonderful it looks on wrist
Ps Next obvious step..... Is it on your wrist permanently? Julian
An absolute stunner! I have really started to appreciate the 5140 along with this piece much more lately. Did you bring it home??
Can you see a space in your collection for a Perpetual Calendar? Or have you already placed your order?
Wonderful post about a truly one on a kind piece. Lovely pictures and attention to detail on your part in this post!
Especially the first and some last wrist shots were so nicely made. Really an interesting and very elegant watch.
This thread is active on the Patek Philippe forum with 35 replies. Share your knowledge with fellow collectors.
Join the Discussion →
