ETA VS. Unitas 6497

Thread: ETA VS. Unitas 6497

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  1. #1
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    ETA VS. Unitas 6497

    I am wondering how close these two movements are to each other mostly for the purpose of interchangeability of parts. I know that there are some notes added to the TZ course that covers this movement to show minor differences in parts appearance so I guess I don't know how different they are. I was hoping to buy a couple non working Unitas movements to have parts for an ETA branded one. Will it work?
    Thanks

  2. #2
    Member lysanderxiii's Avatar
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    Re: ETA VS. Unitas 6497

    There are six types of movements in the 6497/6498 family.

    The 6497,

    The 6498,

    The 6497-1

    The 6498-1

    The 6497-2, and

    The 6498-2

    Within each type all parts that are common, between the two different base models, the two different -1 and the two different -2 all parts, except the bridges are interchangeable. There are a few parts interchangeable between all types.

    ETA or Unitas does not matter.

  3. #3
    Sponsor Tourby Watches's Avatar
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    Re: ETA VS. Unitas 6497

    i don´t think that he have a -2 movement as this are very rare

    it make a difference between

    Unitas 6497/98
    ETA Unitas 6497/98
    ETA Unitas 6497/98 - 1

    the difference between ETA and ETA -1 is the pallet bridge. The pallet bridge is the part under the balance spring.

    here the pallet bridge of ETA Unitas 6498 (with 1 blued screw)


    here the pallet bridge of ETA Unitas 6498-1 (with blued 2 screws)

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  5. #4
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    Re: ETA VS. Unitas 6497

    So does ETA still produce the caliber 6497? I found tech documents for the 6497-1 and -2 both nothing without the suffix. I was looking at a current production watch to grab the movement out of and it is listed as ETA 6497 so I didn't know if that is really what they meant or did they really mean 6497-1. I have sent an email off to the seller to try to get some clarification. Tourby, thanks for the pictures, they helped me figure out what you were talking about. Thanks to the other reply as well.

  6. #5
    Sponsor Tourby Watches's Avatar
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    Re: ETA VS. Unitas 6497

    ETA do not produce any more 6497 or 6498

    the produce only 6497-1 or 6498-1

    (-2 movements are also in production for special brands like Panerai etc.)

  7. #6
    Member BullDawg's Avatar
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    Re: ETA VS. Unitas 6497

    Hi Tourby Watches,

    That is a funky pattern on the neck and bridge. Yet the under lying letter are still there. Will you post some better photos of this watch, back out a few clicks where we can see it all?

    Thanks,

    Bulldawg

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    Re: ETA VS. Unitas 6497

    Thank you again. I just got an email back from the seller who confirmed that it was a current production 6497-1. I will go ahead and purchase it and begin my project. I will probably have more questions, and pictures, along the way. Can't wait to see how it turns out.

  9. #8
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    Re: ETA VS. Unitas 6497

    Hi BullDawg

    i am a official sponsor of watchuseek. You can check my website.



    Hi jkarl

    i can´t wait to see your pictures. Should you need any help let me know.

  10. #9
    CMW & Sales Moderator gigfy's Avatar
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    Re: ETA VS. Unitas 6497

    So let me get this straight. There are 8 versions (with the base ETA & Unitas versions being identical)?

    Unitas 6497 (small pallet bridge)
    Unitas 6498 (small pallet bridge)

    ETA 6497 (small pallet bridge)
    ETA 6498 (small pallet bridge)

    ETA 6497-1 (larger 2 screw pallet bridge)
    ETA 6498-1 (larger 2 screw pallet bridge)

    ETA 6497-2 (larger 2 screw pallet bridge, higher bph)
    ETA 6498-2 (larger 2 screw pallet bridge, higher bph)

    Cheers,
    gigfy
    Just to name a few:
    Sharkey SBDX001 Sharkmaster
    Seiko White Stargate SKZ323
    Hamilton Pioneer Mechanical H60419533
    Hamilton Limited Edition Pocket Watch H51459013
    Timex Camper Mechanical (May 1991)

    -Gone
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    Shanghai Military Diver Model 114 - 24 Jewel SS4 Automatic

  11. #10
    Member lysanderxiii's Avatar
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    Re: ETA VS. Unitas 6497

    Quote Originally Posted by gigfy View Post
    So let me get this straight. There are 8 versions (with the base ETA & Unitas versions being identical)?

    Unitas 6497 (small pallet bridge)
    Unitas 6498 (small pallet bridge)

    ETA 6497 (small pallet bridge)
    ETA 6498 (small pallet bridge)

    ETA 6497-1 (larger 2 screw pallet bridge)
    ETA 6498-1 (larger 2 screw pallet bridge)

    ETA 6497-2 (larger 2 screw pallet bridge, higher bph)
    ETA 6498-2 (larger 2 screw pallet bridge, higher bph)

    Cheers,
    gigfy
    Not quite.

    1) Unitas parts are interchangeable with ETA parts, the only thing ETA did was stamp their own logo on the mainplate. However, there seems to have been a change somewhere along the production and some parts aren't quite the same. In order to cross check what the changes were, you should compile a list if Best-Fit part numbers for both versions (6497 and 6498) and see what numbers are not common. (Jules Borel lists Best-Fit PN in their on-line catalog), personally, I am not that interested.

    2) The 6497-1 and 6498-1 (same for the -2) do not share commonality in the following parts: (all others common)
    - Mainplate
    - Barrel Bridge
    - 3rd Wheel
    - 4th Wheel
    - 4th Wheel (no second pinion)
    - Stem
    - Set Lever
    - Setting Lever Jumper
    - Yoke (-2 variants only)

    3) The -2s (operating at 21,600 bph) have the following interchangeable with the slower -1s:
    - Pallet Bridge
    - Stem
    - Sliding Pinion
    - Winding Pinion
    - Crown Wheel Ring
    - Click Spring
    - Yoke Spring
    - Setting Wheel
    - Intermediate Setting Wheel
    - Case screw

    4) The differences between the base and -1s are more than just the pallet bridge. The reason for the larger pallet bridge was to incorporate the banking pins into the bridge. The base model has mainplate mounted banking pins.

    The hairspring stud, and regulator were also upgraded to the adjustable one found on all current ETAs. There were other minor changes to simplify production.

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