Omega Cal.500

Thread: Omega Cal.500

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  1. #1
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    Omega Cal.500

    Found a Seamaster with a cal.500 17 jewels (adjusted 2 positions) movement. Low 16 mill ref.number. I think about 1958.

    Were these movements pretty good quality?

    Thanks from a new guy.

  2. #2
    Member Joe K.'s Avatar
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    Re: Omega Cal.500

    Yes. Very good quality.
    Here is my Seamaster Deluxe with a Cal. 500



    Quote Originally Posted by ppirate View Post
    Found a Seamaster with a cal.500 17 jewels (adjusted 2 positions) movement. Low 16 mill ref.number. I think about 1958.

    Were these movements pretty good quality?

    Thanks from a new guy.
    Check out my collection at:

    www.omegacollector.com

  3. #3
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    Re: Omega Cal.500

    JoeK. Very nice watch. Beginner question... but adjusted 2 positions?? Not sure of the correct meaning of this.

    Anybody know how long Omega used this 500 movement? I see alot of 501 but not many 500.

    Thanks

  4. #4
    Member Joe K.'s Avatar
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    Re: Omega Cal.500

    The 50X series were produced from1956-60 before being replaced. During this period several improvements were made and movements were renamed. For example the 501 had 2 or 3 jewels added and then probably replaced the 500.

    Adjusted to 2 position has to do with adjusting the balance/hairspring so the watch keeps time as accurately as possible in all positions. Watches can be adjusted to 5 positions + temperature + isochronism. However, this is obviously an expensive undertaking. Therefore many watchmakers will only do 2-3 positions and still get a reasonable product. In the case of 2 positions, it would be the most common positions a watch would be in: Crown down and face up (if i'm not mistaken).


    Quote Originally Posted by ppirate View Post
    JoeK. Very nice watch. Beginner question... but adjusted 2 positions?? Not sure of the correct meaning of this.

    Anybody know how long Omega used this 500 movement? I see alot of 501 but not many 500.

    Thanks
    Check out my collection at:

    www.omegacollector.com

  5. #5
    Member WIS_Chronomaster's Avatar
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    Re: Omega Cal.500

    God what a watch !
    Some of the Inventory :
    Rolex DateJust I - WG & MOP
    Chronographe Suisse 18Kct Chronograph
    Omega Seamaster Bond SMP LTD
    Omega Seamaster 200M Pre-Bond
    Heuer Black/Luminous Dial 200M Quartz
    Omega Speedmaster 3577.50 Moon to Mars
    Omega 3510.50 Speedmaster



  6. #6
    Member georges zaslavsky's Avatar
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    Re: Omega Cal.500

    They are better than an eta so yes very good quality and 100% inhouse.
    Omega the sign of Excellence since 1848. Jaeger Le Coultre Horlogerie de Luxe depuis 1833
    22 times Olympic games timekeeper, Nasa watch supplier and holder of several world records of precision, Omega has the world's trust
    Omega and Rolex for ever
    Eterna Nothing but Watchmaking since 1856
    Zenith Swiss Watchmaking and Chronometry champion since 1865

  7. #7
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    Re: Omega Cal.500

    Quote Originally Posted by Joe K. View Post
    The 50X series were produced from1956-60 before being replaced. During this period several improvements were made and movements were renamed. For example the 501 had 2 or 3 jewels added and then probably replaced the 500.

    Adjusted to 2 position has to do with adjusting the balance/hairspring so the watch keeps time as accurately as possible in all positions. Watches can be adjusted to 5 positions + temperature + isochronism. However, this is obviously an expensive undertaking. Therefore many watchmakers will only do 2-3 positions and still get a reasonable product. In the case of 2 positions, it would be the most common positions a watch would be in: Crown down and face up (if i'm not mistaken).
    The 500 series movements were succeeded by the sublime 550/560/750 series, which were better, but these movements were pretty good.

    500 -- 28 RA SC PC AM 17p
    501 -- 28 RA SC PC AM 19p
    502 -- 28 RA SC PC CAL AM 17p
    503 -- 28 RA SC PC CAL AM 19p
    504 -- 28 RA SC PC CAL AM 24p
    505 -- 28 RA SC PC AM 24p

    Omega produced a 17 jewel date and no date, 502/500
    a 19 jewel date and no date 503/501, and
    a 24 jewel date and no date 504/505 (note the reversal of order).

    The 19 jewel model included an improved automatic winding system.

    The 24 jewel models were chronometers, and included an even more advanced winding system and an improved sweep second hand.

    All were 28mm in diameter, with the no-date 5.55mm thick and the date 6.40mm thick, and ran at 19,800 or 6 beats per second.

    Sam
    Last edited by Hewybaby; March 13th, 2008 at 14:17. Reason: fix table

  8. #8
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    Re: Omega Cal.500

    Thanks for all of the assistance and great info. I'm going to pick this one up. Case back ref 2975-1 (not sure how to post image) but the picture in the database is exact one.
    www.omegawatches.com/cu_vintage

    Thanks...........

  9. #9
    Member Joe K.'s Avatar
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    Re: Omega Cal.500

    Thanks. Purchased by my Grandfather, sometime in the late 1950's in NYC. It then went to my dad and finally to me. Watch is solid 14K and in original condition, except for the crown. I have the replacement but just need to get around to doing it.


    Quote Originally Posted by WIS_Chronomaster View Post
    God what a watch !
    Check out my collection at:

    www.omegacollector.com

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