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These are indeed the dimensions mentioned by FutureGrail.
Check here: https://www.futuregrail.com/auctions/Omega/Ref-055-ST-1750035-prototype-unique-piece-former-property-of-Anton-Bally-director-of-ETA-SA-stainless-steel/May2025/5
And it seems consistent, as the Louis Brandt PC is only 34 mm: https://pushers.io/listings/omega-louis-brandt-perpetual-calendar-ref-175-0300
Best, Emmanuel
A unique Omega prototype
This Omega ref. 055 ST 175.0035, a self-winding bissextile perpetual calendar with moon phases , is a prototype and unique piece , never commercialized. It was one of the personal timepieces of Anton Bally (1946-2002), former director of ETA S.A., one of ...
The nearly total absence of perpetual calendars from Omega's line-up . . .
. . . is puzzling as they've made day-dates, triple calendars, and moon phases for a century. I was aware of the Louis Brandt model of the '90s (and saw it in the metal at OmegaMania), but had no inkling of this prototype. Are you positive regarding the d...
Indeed and the Louis Brandt PC is only 34 mm.
I have added a few links in my reply to Art above. Best, Emmanuel
These are indeed the dimensions mentioned by FutureGrail.
Check here: https://www.futuregrail.com/auctions/Omega/Ref-055-ST-1750035-prototype-unique-piece-former-property-of-Anton-Bally-director-of-ETA-SA-stainless-steel/May2025/5 And it seems consistent, as the Louis Brandt PC is only 34 mm: https://pushers.io/...
My recollection of the Louis Brandt perpetual is apparently like my recollection . . .
. . . of high school years: larger than life. 😄
😅 I've just posted a thread dedicated to the Louis Brandt PC:
I love the second gen pieces.
A watch that widens the eyes as you get closer and closer!
What a beauty, and such unique history!
It appeals very much 👌🏻🙌🏻👍🏻
While this is a piece unit, what really appeals about Omega is that they often bring these kinds of pieces that might not fit into a strict product plan but surprise and delight exactly because of that 👌🏻👍🏻
I completely agree.
But still regret that such a timepiece never became a regular production model. Best, Emmanuel
There's something special about a compact . . .
. . . perpetual calendar. Had I been aware of its dimensions, I might well have chased down a Louis Brandt perpetual when perpetual calendars were my passion.
If your passion is no longer focused on PCs, then obviously it doesn't really make sense anymore.
I don't have a particular passion for this complication, but I hope I'll manage to see a Louis Brandt in person someday.
Agreed, but the watch doesn't look bulky at all on the side shots.
I wish it had become a regular production model. Best, Emmanuel
The Stuff of Dreams 😍, I love watches that have a Story
The Gilt Rehaut is Perfection 🥰
