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Hi folks,

I have an Omega 244 movement from ~1955 apart for cleaning, and noticed something I have not seen before. The upper balance has an Incabloc shock setting much like a modern movement. But the lower balance jewel in the main plate is not something I've seen before.

If I hold the main plate up to the light, it looks like the hole for the balance pivot goes all the way through the jewel. The jewel itself is fixed to the main plate with a screw down apparatus that looks like it provides some springy shock protection.

I'm wondering what this type of jewel is called, and what the proper cleaning and lubrication process should be for this little jewel. Almost seems like I could peg it, leave attached to the main plate and run through the cleaning machine. Good idea? Do I lubricate the pivot from the dial side of the main plate?

Here are some photos:

IMG_2144.thumb.jpg.26c2bb15554c607eb4605f083e70ea22.jpgIMG_2144a.jpg.8d3694f1c4b69d03c41b0010f5ab0b1a.jpg

Thanks!

Hmmm. Just found a parts list for this movement. Looks like the lower jewel is Incabloc also (just different from what I've seen before). So that screw holds down the springy holder for the cap jewel. Guess I'll clean/lube like other Incabloc jewels.

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6 hours ago, RickTock said:

'm wondering what this type of jewel is called, and what the proper cleaning and lubrication process should be for this little jewel. Almost seems like I could peg it, leave attached to the main plate and run through the cleaning machine. Good idea? Do I lubricate the pivot from the dial side of the main plate?

Proper cleaning would be to disassemble it and lubricated the same method used for lubricating the upper jewel.

Then it's made by the same company who makes the upper assembly. You'll see the image on the top third from the left 172

tableau-synoptique.thumb.gif.4e1f8d66d6ba80c567c2f756e48c78df.gif

1480_Omega 244-NEW.pdf

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