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    • By Calvin
      Hello guys..
      I wanna ask..
      How to adjust my eta valjoux 7750 movement to be faster..
      Cause it slow 2-3 minute a day..
      Do i just need to move this part to the (+) sign?? Thankyouu

    • By Giuseppe
      Hi,
      in order to buy appropriate spares in my attempt to service an Omega 175.0083 (7750)  I need some advice:
      1.
      I've already been suggested to replace MS:
      Barrel is Ok and I'm thinking of buying a new MS and moebius 8217 for barrel lubricating as I don't want to spend money on recommended Kluber 125 grease.
      Should I consider instead buying a barrel complete (assuming Barrel complete (180.1) comes with MS installed) wich supposedly comes prelubricated ?
      2.
      Attached image shows automatic device bridge with evident sign of wear from where, to my understanding, the problem orginated: a screw came off
      I cant find original part. 
      ETA part is different from Omega in that the Omega is larger and partially covers hammer two function and the chronograph cam.
      Beside that and since the watch has no crystal back case I think those parts are perfectly interchangeable.
      Do I need to replace the bridge or are there alternative aproaches to this problem?
      TIA
      Giuseppe


    • By perfectkyo
      A new 7750 movement, cleaning and assembly again, why watch swing only 260 °?
    • By matabog
      Hello!
      I am servicing my first 7750 (thank you Mark for the YT videos and Lawson for the Disassembly/Assembly walk-through).
      The movement is not new - let's say it has an obscure unknown history  It appears to be a genuine swiss 7750, but with a lower grade finish (very low...)
      When putting back the balance stones I noticed that there were two sizes (two pairs, because the cap stones fit the hole jewel settings). I put the smaller stone and hole-jewel on the mainplate and the larger ones on the balance cock. I tried to but the larger setting on the mainplate but it didn't fit quite right. I believe the springs are the same size - its just the stones that differ a bit (aprox 0.1mm) 
       
      So my question is: did any of you stumbled upon the same issue? Is it normal for a 7750 to have two different stone sizes?
      Thank you!
      Bogdan
    • By johnbiggs
      Hey, guys, I have a 7750 movement where the rotor screw snapped off. I opened it up and it appears the rest of the screw is still inside the rotor post. Is there anything I can do to screw it back out?
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    • Good to be here, found this place while trying to find out what or where I was going wrong with a Seiko 6119 movement,  just wondering how come i have never seen it before.  I am Francis married with 3  children, all under 10, yes I started late since I am 55 and wifey is 33.  Started off doing pocket watches and somehow now getting into Wristwatches.  Still trying to work that one out. Bought a lot of movements some 10yrs ago and have had them stored away, and now we decided to put down roots, i dragged it all out and now trying to learn more and more as I go along.  Francis Downunder.
    • Today was my 1970s Zodiac Super Seawolf
    • The stem looks like thread worn at top, but might be just the angle of picture. As for the hands not turning, possibly something has slipped on mechanism, like a spring. http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Longines_23ZS might be worth comparing the picture with yours. 
    • hi I'm working on a longines .caliber 23zs. It was not working and i noticed if you moved it the balance would start and the hands revolved until the second hand reached number 5 where it was catching. To cut a long story short i have removed the hands and refitted them and there going fine. But when i went to reset the hands nothing. I pulled he crown out to the position to move the hour and minute hands and there nothing happening. it turns freely but the hands don't.The crown has now come off as well but that screws back on though it seems loose. I have cleaned the stem and examined it to the best of my knowledge and it seems fine. It slides in and out when i release the screw holding it into the movement. I have tried to download docs from cousins but they only show dial diameter.  I have also googled it but there's not a lot out there.Not what i need anyway. I'm just wondering have i missed something obvious that should have been done.. Any advice gratefully accepted. cheers gary
    • if you have a tap and die set,   (and a lathe) just thread a hole in a brass rod and you have the perfect "screw holder".    doe's not work on left handed thread.    vin
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