Jump to content

EB 8800 movement

NicholasG
 Share

Recommended Posts

NicholasG Member

NicholasG

Posted
Posted

For my very first project I decided to take apart, clean and reassemble an old pocket watch. It's an EB 8800 17 jewels. I looked it up and this movement show it's 1 jewel. I'm a little confused. Mine shows 17 jewels. See photos below.

This is the one I looked up.

1232143341_ScreenShot2021-04-11at10_41_37AM.thumb.png.077ae55c935dbe78c47c0ca7a70f790b.png

 

This is the one I have. It says 17 jewels. (sorry for fuzzy pic)

IMG_0119.thumb.JPG.26f03ac4e85cb47226dbe0d45c5f5b0e.JPG

 

Link to comment
Share on other sites
jdm Distinguished Member

jdm

Posted
Posted
45 minutes ago, NicholasG said:

It's an EB 8800 17 jewels. I looked it up and this movement show it's 1 jewel. I'm a little confused.

It was normal for manufacturers to make different versions of a same movement. Sometime the jewel count changed, sometime other elements did. Jewel count was artificially increased for no practical purpose, or decreased becuase of taxation. Sometime the identifier changed, sometime it did not. And you can find a same mov.t under different identifiers, depending on who it was manufactured for. Markings can be present or not, etc, etc.

All that in the attempt to gain a small advantage over competition, that was fierce.

Link to comment
Share on other sites
NicholasG Member

NicholasG

Posted
  • Author
Posted
4 hours ago, jdm said:

It was normal for manufacturers to make different versions of a same movement. Sometime the jewel count changed, sometime other elements did. Jewel count was artificially increased for no practical purpose, or decreased becuase of taxation.

Are all EB8800 movements the same size whether it’s a 1 or 17 jewels?

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • ManSkirtBrew
      1972 Bulova President "E" Sea King 11ACACB movement

      By ManSkirtBrew · Posted

      Unfortunately I'm not that lucky. I started on the train side and after I noticed the binding I pulled everything out except the driving wheel to rule everything else out. It still binds. I'm going to double check that the pinion is fully seated on the staff first, then if no joy I'll push the bridge jewel up a fraction of a mm. Fingers crossed!
    • Waggy
      Rado rotor removal

      By Waggy · Posted

      Happy to have helped, great way to start the day with a win! 🥳
    • doober
      Rado rotor removal

      By doober · Posted

      Thank you for the advise!! It worked. The setting screw was a lock/unlock to remove the rotor. 
    • GuyMontag
      1972 Bulova President "E" Sea King 11ACACB movement

      By GuyMontag · Posted

      I have that French tech sheet too, it is a little different than the English one (eg, it doesn't have the auto works diagram). BTW, it looks like you are looking up the case number in the 1979 ABC supplement. The 1974 ABC catalog does have the 3093 case. As you determined it takes the 1222-5 crystal.  When I serviced my President 'A' (which also takes that crystal), I was able to fit a 29.8 crystal from my DPA crystal assortment. Those are, in my opinion, a great deal. The assortment comes with 10 sizes each from 27.8mm to 32.4mm in 0.2 increments. I pretty much use them for any non-armored crystal that takes a high dome crystal. I think they no longer make them but Cousins has still has some in stock but when I bought them they were around $40 for the set and now they are around $100. Still, at 40 cents a crystal it's still a good deal. For the large driving wheel, I remember I once assembled the keyless/motion works first and when I placed the large driving wheel it was interfering with the setting wheel on the dial side as the teeth were not fully meshing and it wouldn't fully seat. If that isn't the issue I got nothing and am looking forward to see how you solve it 🙂
    • Waggy
      Rado rotor removal

      By Waggy · Posted

      Not sure, but just looking at it, it seems like the screw on the right may be a fake? The one on the left may not be a screw in the regular sense at all, rather a 2 position device, I think you need to point the slot towards either of the 2 dots and one will secure and one will open. Like I said this is just my best guess looking at the pictures.
×
×
  • Create New...