Constellation 14393-9 SC cal. 550 - dial/crown/rotor help

iGuru · Tues. 8:50am

Hello everyone,

I would appreciate your help with my Omega Constellation.

The watch has been opened and these are the markings I was able to read:

Inside caseback:

Omega Watch Co.
Fab. Suisse / Swiss Made
Acier Inoxydable
Ref. 14393-9 SC
Case maker mark: probably CB
Some old watchmaker service marks inside the caseback

Movement:

Omega cal. 550
Serial number: 19,967,804
Adjusted two (2) positions
Seventeen (17) jewels

The watch has the Constellation observatory medallion caseback.

The current dial only says “OMEGA Automatic” and “SWISS” at 6 o’clock. It does not have the Constellation text, star, or Chronometer/Officially Certified wording. The crown is also a round unsigned crown without an Omega logo, so I assume it is a replacement.

A watchmaker told me that the rotor/automatic winding part is damaged or has play. The rotor itself is marked “Omega Watch Co. Swiss”.

I would like to preserve the watch correctly, not over-restore it. I am not planning to polish the case or refinish the dial.

My questions are:

1. Is this configuration plausible as a US-market/export Constellation 14393-9 SC with cal. 550 / 17 jewels?
2. Is the current dial likely a service dial, redial, or a dial from another Omega Automatic?
3. What would be the correct or most period-correct dial type for ref. 14393-9 SC with cal. 550 and serial 19,967,804?
4. What crown should I be looking for? I have seen references to decagonal crowns and Omega crown 4219 / 2.5 mm, but I would appreciate confirmation.
5. Is the rotor shown in the photos correct for cal. 550, or does it look like a service replacement/wrong rotor?
6. Which parts should I realistically try to source before giving the watch for service?

Thank you very much for any guidance.

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MtV · Tues. 9:19am

Stop.

This isn’t a project remotely worth pursuing. Wrong movement, dial, hands, crown, missing bezel that’s unobtainium. The only thing that’s ok here is the case back, I‘m afraid.

theluckyluke · Tues. 9:21am

Hello. I would say the dial is earlier and was transplanted into a 14393 case.

This reference has a different calibre, most importantly with date… so there is some mix up here.

Importantly it also seems to be missing the bezel? That’s a difficult part to replace usually.

iGuru · Tues. 9:47am

Thank you both - I appreciate the honest feedback.

I understand this is probably a mix-up/frankenwatch

Could you please help me understand the specific issues?

What calibre should normally be in a 14393-9 SC case?

Is cal. 550 entirely wrong, or could it be related to a US/export configuration?

What indicates that the dial and hands are earlier/transplanted?

Regarding the front: does my side photo confirm that the correct bezel is missing, or could this be an incorrect oversized crystal?

What should the correct bezel/front assembly look like, and what part name should I search for?

There is a chance that old parts from a previous repair may still be in my family home where I found it, so I would like to know what to look for.

I am not trying to over-restore it - I mainly want to know whether it makes sense to service it as a wearable.

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MtV · Tues. 10:08am

1. All 14393s have a cal 561.
2. It’s entirely wrong.
3. The dial has a configuration with the numbers and indices that doesn’t exist on 14393s. Most of all, it has no Constellation star so it never was a Constellation dial, not even a repainted one.
4. The bezel is missing. It was solid yellow gold and thus the same color as the lugs.
5. The bezel is simply a thin circle made out of gold that sits around the plexi so that it you look at the watch from the top you don’t see any steel.

If you do actually have the bezel somewhere that‘d be good but you’d still need the correct movement and dial.

With the exception of the bezel that’s not called unobtainium for no reason, all parts can be found with patience, money, and if you know what you’re looking for.

I mean this absolutely not as an offense, but the way you’re asking tells me you don’t know much about what you’re getting into and that’s a recipe to burn money, hence the warning.

iGuru · Tues. 10:24am

MtV
1. All 14393s have a cal 561.
2. It’s entirely wrong.
3. The dial has a configuration with the numbers and indices that doesn’t exist on 14393s. Most of all, it has no Constellation star so it never was a Constellation dial, not even a repainted one.
4. The bezel is missing. It was solid yellow gold and thus the same color as the lugs.
5. The bezel is simply a thin circle made out of gold that sits around the plexi so that it you look at the watch from the top you don’t see any steel.

If you do actually have the bezel somewhere that‘d be good but you’d still need the correct movement and dial.

With the exception of the bezel that’s not called unobtainium for no reason, all parts can be found with patience, money, and if you know what you’re looking for.

I mean this absolutely not as an offense, but the way you’re asking tells me you don’t know much about what you’re getting into and that’s a recipe to burn money, hence the warning.

Absolutely no offence taken - this is my first ever encounter with vintage watches, so I really appreciate the honest explanation.

I am genuinely interested in learning what this watch is and what happened to it over the years, but I definitely do not want to burn money trying to force it into something it is not. That is exactly why I posted here before buying any parts or committing to a bigger restoration.

Your answers helped a lot! What I have to admit is that this whole case has sparked something in me. I find it really fascinating how many variables there are in watches

I will check with my family whether any old parts from previous repairs may still exist somewhere. If I find anything, I may come back with photos and ask for your opinion before doing anything.

For now, I will probably treat it as a learning experience and maybe only consider a basic mechanical service if I decide to keep it as a wearable family watch 😀

Thank you for taking the time to explain it clearly.

Dan S · Tues. 10:36am

As has been noted, it's a hodgepodge of parts from various watches. If you want to look at it as a glass-half-full, you have a reasonable starting point to restore two or three different watches. However, most experienced collectors would take the opposite perspective, and understand that they have a collection of parts that would be better used to restore other watches.

Of course, another option is just to wear it as-is, as an interesting curiosity. But I don't think I'd pay to have it serviced.

Constellation 14393-9 SC cal. 550 - dial/crown/rotor help

iGuru

MtV

theluckyluke

iGuru

MtV

iGuru

Dan S

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