Patek Philippe

quattro · 2026-03-03T15:04:30Z

Discover Patek Philippe's collaboration with Belgian retailer Louis Lörtscher, showcasing rare double-signed dials and enriching watch enthusiasts' knowledge.

LörTscher - Patek Philippe in Brussels, Belgium

Yesterday, after finishing my post about the partnership between Patek Philippe and the Grogan Company of Pittsburgh, Pennsylvania, I looked for other examples of the ref. 1401 on display at the Patek Philippe Museum, whose double-signed dial had piqued my interest.

It led me to come across this watch sold by Christie's in 2017, whose dial is signed "LörTscher" at 6 o'clock, with an unusual script:

The L extends under the other letters.

And the horizontal bar of the T extends above the R and the S.

Ref. 1401 manufactured in 1939 (movement no. 833'109, case no. 618'601) and signed Patek, Philippe & Co, Genève, retailed by Lörtscher

Credit: Christie’s

Intrigued by this name unknown to me, I began digging and discovered another very little-known and documented collaboration :

the one Patek Philippe had with Belgian watch retailer Louis Lörtscher.

As the following photos of a ref. 130 show, the Lörtscher boutique (“Horlogerie LörTscher”) was located in Brussels, Rue Montagne de la Cour, 81.

credit: Shellman

Here's a view of the rue Montagne de la Cour as seen from the Place Royale. Number 81 corresponds to the building on the left which forms the corner with the Place Royale.

credit: Bruxelles autrefois, Bruxelles disparu

Now, here are the other Patek Philippe timepieces I could find featuring such a double signed dial with “LörTscher ”.

REF. 96 (?) FROM 1939

The photo shows that the “Horlogerie LörTscher” was at some point taken over by the Ditesheim brothers (“DITESHEIM Frères, Succ.”), who, as far as I know, founded the Movado watch brand in 1881.

credit: @jojolamontre

REF. 491 IN 18KYG WITH Cal. 9-90 FROM THE 1930s

This beautiful watch, sold by the Shellman Ginza Shop seems to have been acquired by @alpina_b10_allrad.

credit: shellman-ginzashop-blog.com

REF. 1471 IN ROSE GOLD

Case no. 659823, Movement no. 954659, 31mm champagne dial with gilt baton markers, Caliber 10-200 movement

Notice how the horizontal bar of the L forms a sort of T with the index 12 of the small seconds.

credit: Case Auctions

REF. 2443 IN ROSE GOLD

Movement no. 974232, case no. 512741 - 26 mm

credit: piguet.com

REF. 2457 IN ROSE GOLD

32 mm, manufactured in 1950 and sold in 1951

credit: thewatchcollectors.com

REF 2483 IN YELLOW GOLD

33 mm, Calibre: cal. 12-120 manual winding, Movement number: 939'042, Case number: 674'810, made in 1952

credit: Sotheby’s

REF. 2510 IN YELLOW GOLD

37 mm, circa 1953 - Caliber 12-400

Here, again, the horizontal bar of the L forms a sort of T with the index 12 of the small seconds.

credit: @2tonevintageofficial

REF. 2525-1 IN YELLOW GOLD

movement No. 744062, case No. 688819, Cal. 10-200

credit: Antiquorum

N° 833198 / 618589 IN 18K GOLD

9-90 Caliber

credit: Artcurial

18K YELLOW GOLD PRE-REFERENCE

20 mm case

credit: Wannenes

COCKTAIL WATCH IN 18K GOLD

Case: 14 x 24 mm

credit: timestudiowatches.co.uk

I know that this is a very “niche” post, but I personally love to learn as much as I can about this beloved brand (I mean Patek Philippe).

And, hopefully, some of you will share my interest.

Thanks for reading.

Best, Emmanuel

💰1728 Marketplace Listings for Patek Philippe›Patek Philippe Calatrava · 2 for sale · 8300 discussions›

LörTscher - Patek Philippe in Brussels, Belgium

LörTscher - Patek Philippe in Brussels, Belgium

Some gems here, quattro.

Great looking, indeed.

Don't think I was, quattro.

I like co-signed pieces when the name of the retailer makes me dream.

Gubelin?

Why not? But this name doesn’t mean a lot to me.

Why not, indeed!

Absolutely, very cool corner indeed.

Here's a Gübelin which is to die for...

Amazing...

Yes! I will post about it some of these days!

Great post again, had a good reading session

Thanks a lot, Derreck.