Jump to content

Ladies Accutron tuning fork watch

Recommended Posts

From a recent junk watch lot from eBay, I found a ladies Accutron watch. I was expecting a ETA quartz movement inside but to my surprise and delight, it's an actual tuning fork watch.



But my delight quick turned to disappointment when I discovered that someone jammed in a wrong size battery in. The battery is so huge that it has deformed the forks to the maximum limit. I tried prying it out but it's really stuck fast.

Does anyone have the service manual for a ladies Bulova 2210 movement? I have to figure out a way to get the battery out without causing further damage. 

Thanks in advance.

Link to comment
Share on other sites

Worth just searching for Bulova 221. The zero on the end for 2210 indicates no complications but most references are just to 221.

With that you'll find articles like...



.. which look like they could be handy.

Also Google watchguy bulova 221 which should point you to a Technical Letters reference of interest.

Edited by WatchMaker
  • Thanks 1
Link to comment
Share on other sites

Thanks for the effort everyone. Ebay still has parts for the 221 but the prices are crazy. The price for a coil/circuit assembly is more than half the cost of the whole watch.

I managed to pry out the battery after removing some parts. It took quite a bit of effort to get the battery out. The previous repairer must have installed it with a hammer.


The gear train is really weird. It has two worm gears in it. I wonder what the proper lubrication method is.


Anyway, the coils appear okay, measuring about 8K each and the feedback coil around 1K. In place of the usual transistor, capacitor and resistor, there is a black, squarish block with an integral switch sticking out of the bottom. 

I powered it up but it doesn't oscillate. I'll check if I missed anything later.

Link to comment
Share on other sites

I worked on it a little this afternoon. The circuit is really sneaky. There is a normally closed switch projecting out of the bottom of the IC. If the switch is closed, oscillations are inhibited. So when testing the circuit, if the switch is not wedged open, the oscillations will not start and gives an impression that the circuit is spoilt. I wonder how many good coil assemblies were thrown away because of this design.

The oscillations are very weak and current draw is very high. I'll need to do a thorough cleanup and check it again. I hope the oversized battery didn't damage the tuning fork.

Link to comment
Share on other sites

22 hours ago, HectorLooi said:

Does anyone have the service manual for a ladies Bulova 2210 movement?

I renamed the file when I went searching for it all I had was a PDF labeled 221.   then it doesn't even start off like one of their normal manuals somebody gives us a bonus page and conveniently skips over the title page.

Accutron 221.pdf

  • Thanks 1
Link to comment
Share on other sites

  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Even if there was a cap jewel on the dial side, the pivot will still drop off the cap jewel maker's side when the watch is turned dial down. There still needs to be end shake, the cap is mainly doing its thing when the pivot is resting down on it and then any part vertical position where it still may touch. I guess its assumed that dial up is the most frequent position hence one sided cap  jewel on the MS. That sounds feasible as the watch spends it's night that way up.
    • Thanks, @Nucejoe. That's good news at least. Just when I thought I was done with the balance wheel and shock-absorbers! 😀
    • My guesses.. 1. wood chips for drying parts in after the final rinse. A bit of an archaic practice these days. 2. could be French chalk for brushing cleaned clock plates with....  or maybe diamantine powder for polishing.... could also be oilstone powder, also for polishing, although the stuff that I have got is slightly greyish. 3. Blueing pan. Fill it with brass chips, place item to be blued on the chips and hold the pan over a spirit burner. 4. & 5. Pallet warmer for softening the shellac in order to adjust the pallet stones.
    • Maybe not the best place for such a question... 21 jewels with the last 4 being cap jewels on either side of the escapement, but only the easily visible side of wheels 2 & 3. Does a one sided cap jewel setting provide much benefit? I get that they reduce friction by keeping the pivot on its tip rather than side, but if it can still shift away from the cap jewel since there isn't another to do the same job, is the pivot not then on its side in the jewel in pretty much any position other than DU? I'm sure it's just to get the jewel count up for marketing purposes, but still. My pre-coffee mind wants to know.
    • White powder I don’t know- radium lume? The first bit of kit looks like the chips and wand for bluing screws and hands and such. what hold and control the heat perhaps…wand for holding over the flame How about borax flux for the powder?
  • Create New...