Jump to content

Help to identify a zenith p/w movement please


Recommended Posts

Have you checked on Dr. Ranfft's site? Measure the size, in lignes, and scan the right column for matching sizes. You then look to see if it says "manual wind" in the center. Then look at the images. You'll probably find it. Good luck.

Dr. Ranfft's site

(I see that you're pretty experienced, so you probably have tried this. Sorry if it's so obvious.)

Edited by MrRoundel
Add parenthetical note.
Link to comment
Share on other sites

Have you checked on Dr. Ranfft's site? Measure the size, in lignes, and scan the right column for matching sizes. You then look to see if it says "manual wind" in the center. Then look at the images. You'll probably find it. Good luck.

Dr. Ranfft's site
(I see that you're pretty experienced, so you probably have tried this. Sorry if it's so obvious.)

Hi Mr Roundel. I’ve been taken directly to dr ranffts site before when searching for a known movement I’d, but to be honest I’ve never looked at it from the perspective of using it as a comprehensive, searchable data base. Thanks for the tip. I don’t consider myself to be experienced by a long chalk in comparison to some of the longer served folks on here - but I’ll try not to let the compliment go to my head :-). Thanks again and I’ll keep you all updated on what I find out.

Regards
Deggsie


Sent from my iPhone using Tapatalk
  • Like 1
Link to comment
Share on other sites


Hi Mr Roundel. I’ve been taken directly to dr ranffts site before when searching for a known movement I’d, but to be honest I’ve never looked at it from the perspective of using it as a comprehensive, searchable data base. Thanks for the tip. I don’t consider myself to be experienced by a long chalk in comparison to some of the longer served folks on here - but I’ll try not to let the compliment go to my head :-). Thanks again and I’ll keep you all updated on what I find out.

Regards
Deggsie


Sent from my iPhone using Tapatalk

Still scratching my head with this one. I have found Ranfft to be useful, but photos showing the correct dial side don’t have the same cover side features and vice versa. For clarification which diameter should I be measuring for the calibration in lingne? Thanks in advance



Sent from my iPhone using Tapatalk
Link to comment
Share on other sites

You should measure the maximum width of the movement in mm then convert the measurement into Swiss lignes there are online converters that will do this for you many of the early zenith calibres only have the ligne size as the calibre number , the serial number on your watch suggests a production date of a round 1915.

Link to comment
Share on other sites

You should measure the maximum width of the movement in mm then convert the measurement into Swiss lignes there are online converters that will do this for you many of the early zenith calibres only have the ligne size as the calibre number , the serial number on your watch suggests a production date of a round 1915.

5f1837785d845ad7256d51adb24bdf2e.jpg



Sent from my iPhone using Tapatalk
Link to comment
Share on other sites

Inkedmeasurement_LI.thumb.jpg.264a98fb12066fcdaf70598101072be6.jpgSorry I have misunderstood the photo you have shown yes the line you have shown in black is the point at which you need to measure across as that would be the widest measurement

Edited by wls1971
Link to comment
Share on other sites

Inkedmeasurement_LI.thumb.jpg.264a98fb12066fcdaf70598101072be6.jpgSorry I have misunderstood the photo you have shown yes the line you have shown in black is the point at which you need to measure across as that would be the widest measurement

Thank you for your help wls


Sent from my iPhone using Tapatalk
Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Not easy to find this one everywhere,  so it depends where you are located. Joining it back together might be possible, i have silver soldered mild steel before even with traditional plumbers lead and its a pretty strong joint, but bere in mind this is only 1mm diameter.  The join would need to be very accurate,  it not something i have heard of anyone trying before. The part no 401 is the swiss code number and relates to watch winding stems in general
    • Thanks everyone for your helpful replies. I think between us we’ve worked out what’s going on. Next job is to have a proper look at this great wheel assembly, see if I can remove the clip and the friction fit pinion, give the bits a good clean, then put it back together with a bit of blue grease. I’ll also get the pallet fork under the microscope to see if it’s ok or been damaged. 
    • The cannon pinion (be it conventional style or what you see in this movement) should slip on its arbour so the hands can be set independently without affecting the gear train.  If there is too much friction between the cannon pinion and the second wheel, turning the hands to set them backwards can sometimes force the escape wheel teeth to overrun the pallet stones, creating the behaviour you describe. The train is running in reverse when this happens.  This can often chip the pallet stones. I’d say at least half of the watches I’ve inspected with very tight cannon pinions had chipped pallet stones. Hopefully this isn’t the case with your watch.  I’m not familiar with this movement but you need to get the friction in the cannon pinion adjusted correctly.  Hope this helps, Mark
    • Pallet fork was in. I’d had the movement running ok, and only removed the balance to flip it over and install the keyless works and date mechanism. The pallet fork wasn’t locking the gear train when hand setting - it was oscillating as the escape wheel rotated. This may have been in one direction only - can’t remember. 
    • Hi   Find attached parts/repair notes for the JLC 911,  might be useful. JLC_JLC 910, 911.pdf JLC_JLC 910, 911 Repair Notes.pdf
×
×
  • Create New...