782-1 calibre

[eckky]

Hello all,

 When dismantling a 782-1 the cannon pinion vanished , there one second  ,next it was gone , vanished !. (the inexperienced watch muddler curse must struck it.)

 Trying to get a replacement but there are so many different ones. The parts sheet for a 781 calibre says p/number 245 with clam notch, which I assume is almost the same as a 782-1.

So when looking I find ones numbered 245 w/clam notch,  sweep second hand, canon pinion, but different calibres and different heights and possibly different amount of teeth.

 Is there a code I should know to find the right one? I cant measure the height etc, of the old one as it vanished without leaving details.

[watchweasol]

May be I missed somthing but what make is it.

 

[jdm]

3 minutes ago, watchweasol said:

May be I missed somthing but what make is it.

That, and why not posting a picture for good measure. It helps others help you, and disseminate information at the same time.

[LittleWatchShop]

Nothing disappears. Get a magnet and sweep.

[eckky]

Sorry , its an Excalibur, 17 rubis, swiss made with incabloc,   from sixties/seventies?.

Good news panic over Taking " LittleWatchShops " (thanks) advice I got a more  powerful magnet and went all over the place again and found it about 18" away and sitting on a wooden ledge 6 " from the floor between my desk and the wall.

If in future If I need parts is it better to hunt for the make and calibre or just the calibre?

[LittleWatchShop]

YAY...the one example where magnetism is the watchmaker's friend!

Don't forget to demagnetize the canon pinion.

A wise forum member taught me to put the movement in a baggie when removing click springs.  Since you are new to this activity, I am passing this tip along to you.

[JohnR725]

5 minutes ago, eckky said:

If in future If I need parts is it better to hunt for the make and calibre or just the calibre?

For the most part parts never really disappear they're just really good at hiding. Yes occasionally one will hide so good it will never be found again but for the most part if you're willing to really look for you will find it. Normally big magnets and watches don't mix but big magnets and watch parts are definitely good.

Then what exactly were you looking for? For instance I thought you were looking for a Tissot 782-1 As it has the exact right caliber number. You can find it at the first link below but it also find a whole bunch of other watches that have a similar number maybe they don't have to – but that all 782's I guess we got the pick and choose which one we wanted.

Always best to give a name preferably of who made the movement. Often people new to watch repair think that whoever's name is on the dial or often times on the main plate is who made the movement sometimes it is sometimes it isn't. So we prefer who actually made the watch movement. Then the number of course and a pictures really nice. Especially if it's anything obscure it really helps a lot.

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Tissot_782_1

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Dugena_1042

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Felsa_782

http://www.ranfft.de/cgi-bin/bidfun-db.cgi?10&ranfft&0&2uswk&Longines_782_1

 

Then it would be really nice if you could give us a picture of your watch because? Notice all the links up above kind of the standard place to look up watches and I'm not finding a Excalibur? Then a quick search online I'd be really curious to see your parts list for the watch? That will give me a better understanding of what's bothering me right now?

[watchweasol]

Having dug a little deeper, found out that Excalibur  used Tissot 781-1    782 movements, so one assumes rightly/wrongly and with the lack of pictures  thats what you have ?      According to the sheet the movements 781-1 being the base movement.      sheet attached just in case it differs from the one you have

2790_Tissot 781.1,782.1,783.1,784.1 (8).pdf

[eckky]

Thanks for the data sheet. 

On the watch movement back is a number 782-1.  So I can take it as 781 being the base model with successive model numbers have add-ons/slight differences to the basic. 

Pic attatched

[watchweasol]

If you look at the web site, google "ranfft tissot 782" and it will give you a breakdown of the family and also the variants plus additional information.   When looking ait watch typoes and family variations Dr Roland Ranfft's site is a gold mine of referencr information.

In answer to your question  the 781 is the base movement.

[anilv]

When ordering parts consider

1. Hour wheels and canon pinions.. Heights may vary if the watch has no seconds, has date or day+date. Here going with the base movement won't help. Dial material will also play a part as a thick dial will require taller wheels. Also for dials with mystery hands etc you'd be better off measuring and sending off the details together with the calibre to the parts house.

2. Train wheels. different beat-rates will have different tooth counts thru the train.

3. Mainsprings - here if there is a change of beat-rate the mainspring will be different.

4. Balance staffs.. Staffs for watches with and without shock absorbtion will vary. I've seen staff which are shock specific but I have had much experience to tell if they work with other shock absorbtion systems.

5. On some movements, wheels with cap jewels will have different ends compared to wheels with uncapped jewels. Not all as some manufacturers like Seiko have a common part.

Good luck!

Anilv

[eckky]

On 1/13/2022 at 8:34 PM, watchweasol said:

If you look at the web site, google "ranfft tissot 782" and it will give you a breakdown of the family and also the variants plus additional information.   When looking ait watch typoes and family variations Dr Roland Ranfft's site is a gold mine of referencr information.

In answer to your question  the 781 is the base movement.

Thanks for that , I had a look and it is a goldmine. 

 

Thanks ANILV,  there was me thinking this watch repair thingy is easy .

You have opened my eyes to the skill , patience , knowledge and experience needed.   I have a long way to go.  I enjoy taking old watches apart and seeing the workings. 

I'll need to see what beat rates , shock absorption, balance  shafts mean.