New Spring Arbor or barrel assembly source

[ritt]

 

I am new to watches and I disassembled a Bulova that I have had for years.  Doesn’t keep time well.  It losses a about a min an hour.  I also don’t think that the pendulum that winds the movement has ever worked correctly, and the crystal is cracked.

The watch is a Bulova c877620

 

My question is there a place to go to find parts diagram and numbers?

 

Last night I was disassembling the main spring.  As soon I got the cover off the spring launched the arbor.  I can’t find it anywhere.  I am a little lost on finding a replacement arbor or mainspring assembly. I got this pic before the assembly launched itself.  OD of the gear part is 11.6mm. 

 

Would something like this from ebay work?  It doesn’t look the same as what I have.  The top and bottom of my barrel assembly is flat and the one pictured has a raised section.

   https://www.ebay.com/itm/385001940092?hash=item59a3e7647c:g:Nm8AAOSw2hdizMil&amdata=enc%3AAQAHAAAA8OeH3ng%2BR%2Bex6TRMfjlxAlH1ODv44NKiFBBs8DFSP6BTY3ubDdOx4HFwwEd64ECx6RbwZRnl%2Fsu0FhSbLMOcfoiDAqHKfXWYnWoUMpqhPyuXjyzWguK5v%2FnKFnNjoIHvJ%2B4Jo0NF67XXFKqkjusn7QpzsfXlRllZQVHVfEf2gVPs4IvvNgUO2k5cSpUd1MA67E%2BR0TPXj%2BUMab2SiMFUzZnesjEIjVbbTGqyOypcLH9W6VlaUysXHELpm8kPaOsHmn9gNOa68vWnuTYlaw4hjWT08bAaLkVgoZEDsaBsvvBuRLNtFWl7eAu7gyU1tFQaqA%3D%3D|tkp%3ABFBMxsuGhMxh

[clockboy]

Welcome to the forum. Enjoy

[Walt]

Did you get any reply?  I did exactly the same thing with a Wesclox watch, Seiko 6602B movement (or clone).

Walt

[bklake]

I launched a barrel arbor once.  Searched for an hour and never found it.  6 months later, I saw something shiny sitting on top of a stack of magazines.  My launched barrel arbor.  There is hope it will surface. 

[watchweasol]

Hi Walt when working on things that have a propensity to escape/launch  ie Click springs etc work under or in a large clear plastic bag that way it traps the errant part within the bag. No more spending time on your knees like the Archbishop looking for bits in the carpet, saves you sanity.

[RichardHarris123]

5 hours ago, bklake said:

I launched a barrel arbor once.  Searched for an hour and never found it.  6 months later, I saw something shiny sitting on top of a stack of magazines.  My launched barrel arbor.  There is hope it will surface. 

I never had problems with barrel arbors until I did.  Somehow it didn't want to fit, pinged away and I still haven't found it. 

[ritt]

Hi Thanks for getting back to me.  I did figure out the movement part number.  Its a miyota 8200.  Right after I ordered a new spring assembly I ended up finding the arbor.

It made is about 20 feet from where I thought it landed.

I also ordered a new third wheel.  Found a chipped tooth on one of the gear teeth.