Jump to content

One-button chronograph

noirrac1j

By noirrac1j
in Watch Repairs Help & Advice

 Share

Recommended Posts

noirrac1j Distinguished Member

noirrac1j

Posted
Posted

Hello,

I need input identifying the caliber of a 17 jewel movement. There aren't any markings, and the dial side has minute/ seconds dials at 9 and 3. It is a manual winfing one button chronograpg with brand NIGA on the dial. The balance has a bent pivot and I'd like to get it running again. Thanks for all info.

 

J8a5d351e6720d10217926acb6d4bd85d.jpgd7abc3275d40bd6c8d02619f0d1b13a4.jpg

 

Sent from my SM-J727T using Tapatalk

 

 

Link to comment
Share on other sites
wls1971 Distinguished Member

wls1971

Posted
Posted (edited)

Its a early Landeron Hann I think possibly a calibre 2 but the usual applies photos of the dial side please for positive identification

Is it a 30 minute register or 45 min on the chronograph ?

Edited by wls1971
  • Like 1
Link to comment
Share on other sites
noirrac1j Distinguished Member

noirrac1j

Posted
  • Author
Posted
Its a early Landeron Hann I think possibly a calibre 2 but the usual applies photos of the dial side please for positive identification
Is it a 30 minute register or 45 min on the chronograph ?
Sure.

Jda31c16f9acf5ccd181700ce4a31406b.jpg

Sent from my SM-J727T using Tapatalk

  • Like 1
Link to comment
Share on other sites
RyMoeller Super WRT Addict

RyMoeller

Posted
Posted

That's an interesting movement that looks a bit like what you would see in an early 20th century pocket chronograph.  Unfortunately that's like the dark ages where written documentation is hard to come by.

I did a bit of internet scouring and came up with this very brief blog post regarding early Hahn chronographs.  I don't know the calibre but you might find it useful.

https://clocksavant.com/blogs/news/servicing

Link to comment
Share on other sites
noirrac1j Distinguished Member

noirrac1j

Posted
  • Author
Posted

Yes @RyMoeller its an early chronograph. It doesn't belong to me, but the owner told me his father "negotiated" it from an Italian pilot during WWII in exchange for not being taken prisoner. I am trying to bring it back to life. The balance staff pivot isbent, but not broken, so I am trying to find a replacement rather than attempting to straighten. Thank you for the material. I have printed it out. I have been able to ascertain that the movement is a Landeron/Hahn...probably cal 2. From there things get confusing because the two balance suppliers I've been able to find use the 15.5 ligne to identify, but they call it different things

http://www.balancestaffs.com/balancestaffs.php

Calls it Landeron(Hahn) 15.5 , staff BS3324

http://www.vintagewatchmarket.com/store.html#!/LANDERON-Hahn-most-calibers-Chronograph-Balance-Staff/p/754166/category=151303

Has TWO 15.5 chrono balance staffs 

Landeron Caliber 46 (15 1/2''') Chronograph Balance Staff (DCN 1001).
Height 468 (contact us if you need the other dimensions).

Landeron 15 1/2''' N (Nouveau) Chronograph Balance Staff (DCN 1000).
Height 467 (contact us if you need the other dimensions)

I also got a quote to machine a new staff from scratch, and it ain't cheap.

I'll post more pictures on this as the project moves forward.

J

Link to comment
Share on other sites
noirrac1j Distinguished Member

noirrac1j

Posted
  • Author
Posted

 Here is what it looks like underneath the dial:

DSCN5624.thumb.JPG.10e96ac8debf07bb3091c2d97f2d1c6e.JPG

@wls1971 Can you confirm its a Landeron Hahn? 

Here is what the balance pivot looks like:

DSCN5626.thumb.JPG.0320a4b4e99cc385ed46f6bc1d073e88.JPG

I don't think it can be straightened out,but I'd love input if possible. The darn thing will tick if its dial-down, so probably all else is OK, but I plan to replace the mainspring as well.

J

Link to comment
Share on other sites
wls1971 Distinguished Member

wls1971

Posted
Posted (edited)

Yes its a 15 1/2 ligne 35mm or 16ligne 36mm Landeron/hahn  it looks like the bottom cap jewel for the balance has been replaced could this be the cause of the bent pivot ? 

Edited by wls1971
Link to comment
Share on other sites
noirrac1j Distinguished Member

noirrac1j

Posted
  • Author
Posted
6 hours ago, wls1971 said:

Yes its a 15 1/2 ligne 35mm or 16ligne 36mm Landeron/hahn  it looks like the bottom cap jewel for the balance has been replaced could this be the cause of the bent pivot ? 

YEs it noticed that bottom cap as well. Its hard to say if that was the cause, as the caseback has one watchmaker's date to 1951...nothing else. Its fair to say the watch may have been dropped or sustained a strong jolt. I am going to take the measurements of the balance staff that is present, and order a new one. I might try my hand at straightening it. Thanks for your input!

J

Link to comment
Share on other sites
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • JohnR725
      Omega cal. 565 - low amplitude

      By JohnR725 · Posted

      as you took the mainspring out what did it look like? It's amazing how much amplitude you can get if the mainspring actually has the proper shape. last week I was doing a 12 size Hamilton and was very much surprised with the beautiful back curvature the mainspring had. Then the watch had a really nice amplitude the group would be so proud it was 350 until I dropped the lift angle down to 38 that drop the amplitude quite a bit below 300. then with the beautiful back curve it still had really nice amplitude the next day. I really wish all my mainspring's look like this as the watch had beautiful amplitude the next day. So many of the aftermarket pocketwatch Springs I see now do not have anything resembling a back curve may be a slight curve and that's about all. They still work but they just don't work as nice as a properly made spring. then Omega as all sorts of nifty technical documentation unfortunately every single corner is watermarked with where it came from who downloaded it etc. very paranoid company. On the other hand I will snip out images like from the document on recycling a mainspring barrel. for instance here's the section on what your mainspring should look like. water damaged a lot of times means rust was there rust on this watch?
    • RichardHarris123
      Without Our Forum

      By RichardHarris123 · Posted

      I wondered that?
    • Neverenoughwatches
      Without Our Forum

      By Neverenoughwatches · Posted

      I dont understand why a patreon membership would have limited places ??
    • clockboy
      Hi all

      By clockboy · Posted

      Welcome to the forum, enjoy. It’s highly unlikely you will be able to purchase a new bezel look on eBay for a pulsar watch for repair to find a bezel.
    • JohnR725
      Balance spring fell out of regulator pin.

      By JohnR725 · Posted

      just one little minor reminder here this isn't your normal balance wheel.  pages 17 and 18 are what you really want to be looking at. normally studs don't turn but this watch has the etachron system designed for lots of adjustment. Personally I would try to rotate the stud back to where it's supposed to be. If you're lucky you didn't actually bend it at the stud it just looks really bad as the stud has been rotated grossly out of position.. I think things will look a lot better if you put the hairspring back where it's supposed to be by rotating the stud. it's hard to tell if you actually did bend it at the stud or not we won't know until you rotate the stud back more or less where it's supposed to be. Then you want to pay attention to the manual of how to put the hairspring back in the regulator pins because yes they rotate also and they rotated specific directions otherwise bad things will happen to your hairspring. so initially you can open up the regulator as wide as it can go and don't worry about closing it until thing everything is right then you can close them a little bit
×
×
  • Create New...