Jump to content

Sentimental Repair, Croton Quartz Needs Caseback, Miyota 280-39 Day/Date Movement

Barsomn
 Share

Recommended Posts

Barsomn Member

Barsomn

Posted
Posted (edited)

Hello all, I have a Croton AquaMatic on the bench. This was my brother in law's wife's great grandfather's watch. (Say that five times fast) He wore it for some years. Looks like the caseback was lost at some point, probably to investigate why the movement stopped ticking. He may have worn it without the back or at least stuffed it in a drawer because it was very dirty within.

I cleaned everything up and tried a fresh battery but no luck. She really wants to wear it for sentimental occasions and I'm a watchmaker at heart: so I don't want to return it without getting it running first.

Since these photos I have cleaned the watch up quite nicely, but I need two parts: The movement assembly, which is a Miyota 280-39 with day and date complications, and the caseback with gasket. I found a few Miyota 280-39 variations with just the date, but I would dislike having a blank space where the day is supposed to go once it is put back together. Seems ungenuine.

I am trying to keep a reasonable budget. There is a chap who has one of these on eBay but wants a sum well more than I find reasonable at $130. Maybe someone else has input on that pricing? He started at $180 and slashed that through so I think he just doesn't know what it's worth. (The store sells mostly industrial electrical equipment.)

Any input on where to source parts like those? I tried the usual suspects like Esslinger, etc. but to no avail.

Thanks! Also for those who saw my intro post, I am becoming more proficient by the week. I have successfully serviced a mechanical movement that runs within spec afterwards! It's an immensely gratifying feeling. Thank you for your valuable feedback on this post.

 

 

IMG_9609.JPEG

IMG_9610.JPEG

IMG_9611.JPEG

Edited by Barsomn
Barsomn Member

Barsomn

Posted
  • Author
Posted

Thanks all, looks like the 2105 is a modern replacement. Just need to confirm the size in lignes once I take this out of the box again this weekend...

CaliberCorner Info Page

Esslinger Movement Listing

The case back is another story, I can only think of transplanting from a donor watch but again I can't really find any of these. Is there a source of generic case backs that anyone has used for replacement parts?

watchweasol Distinguished Member

watchweasol

Posted
Posted

The problem with watch cases they all come fitted with a back  loosing one is a pest there are no sources I know of just for backs. As you will appreciate there would be thousands of different ones .  Once you have the size of the dial and movement there are places for cases complete purcased complete or a trawl on the net, ebay and others for a donor non worker to rob the case off.

  • Like 1
 Share
Go to topic listing

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • VWatchie
      What's your thoughts on this Rolex Sea-Dweller, ref. 16600, calibre 3135 project?

      By VWatchie · Posted

      Well, my fundamental stance is that I want to go in and out without leaving any trace other than a shining, perfectly running movement. So, no scratchings on the inside of the case back lid, no marred screws, no debris, no fingerprints, and so on. That is, my goal is to make it impossible for the FBI to track me down. As a professional, I suppose you might want to keep track of returning watches, but as @JohnR725 mentioned, we can keep detailed computer records without marking the watch at all. That may not be true for every watch, but luxury and COSC-certified movements do have unique numbers. John also says it’s best to leave no sign you were ever there, and I couldn't agree more. Now, suppose the Sea-Dweller I'm working on is one day scrapped, and you want to sell the case-back separately (perhaps the case was destroyed in a plane crash). Then the scribbles on the inside no longer reflect the current movement inside the case. Also, the engraving will likely halve the market value of the case back. It had been "sleeping" for about a week and a half. Yes, the "debris/old lubricant" theory is my hypothesis as well! It will be interesting to see what I find once I have time to start disassembling the movement.
    • MikeEll
      Help with repairing a quartz clock

      By MikeEll · Posted

      I've repaired a few of these, having some success with stripping and cleaning the mechanism.  They are so cheap though, its hardly worth the effort in many cases.
    • watchweasol
      Oldhippy

      By watchweasol · Posted

      Get well soon Old Hippy, torn muscles.,  not good
    • SwissSeiko
      A lathe with indexing that won't break the bank?

      By SwissSeiko · Posted

      Id love to see how he has the output shaft mounted to this setup, as I have the same rotary stage and stepper in my build.
    • Poljot
      Broken watch stem in watch crown

      By Poljot · Posted

      If you see at least one thread protruding, or even a half, then you may have a chance using this "tool", but don't squeeze hard. Lot's of patience, and if you notice any signs of loctite or other adhesives, then apply several drops of acetone on top of broken stem. Use heat (hair dryer) also. You should be able gradually turn it counterclockwise, just like i did on this broken Timex stem, which was glued with something like nail hardener. Then you can use an extender to save your broken stem. https://m.media-amazon.com/images/I/513DVvkfW5L.__AC_SX300_SY300_QL70_ML2_.jpg   You can also try cutting a small grove / slot on top of the broken stem to use 0.7mm flat screwdriver.   Depending on the Crown material and Stem material, you can try dissolving the stem. 
×
×
  • Create New...