Tissot Use Key No 200T

[Chopin]

I have a Tissot ladies automatic watch. Small in size. It says on the back Use Key No 200T.

Now I know the set of keys and I don't have that. What I'd like to find out is how does this case open and if possible how should I do it if I don't have the keys.

This one seems to be a 2 piece case because I can see a small space between the "case" and the other case where the movement and dial will probably be housed.

Is this like one of those roamers that get pushed out from the initial case ?

The issue here is that the crown and stem go through the main case so I assume I have to remove that one first. How can I do that ?

We're talking about a vintage ladies Tissot Seastar Seven Automatic 22mm case diameter.

[wls1971]

Its a front loader if you have to use a key 200T the keys where exactly the right size that when the crystal is gripped the right amount of tension is placed on the crystal to allow removal you could use a crystal lifter to remove the crystal. Not all Tissots one piece cases had split stems so it may be a one piece stem .

this topic as been covered before:

 

[Chopin]

Oh so the role of the tool is to simply squeeze the crystal and then remove it just like the claw tool ?

Does this mean that my only way of getting to the movement (the watch has no issue but it simply wouldn't start) is by: removing the crystal > removing the hands > removing the dial > removing the stem ? I've heard about something like this on some Tissots...

Is it possible that mine just requires removing the stem and crown somehow and then the movement dial and caseback comes out ?

As I said in my first post it seems as this watch has a 2 piece case as I can see a space between the case and the so called case back.

Do 2 piece stems just require that you pull them out with a bit of force or must you make any special movements or anything like that ? Not saying that I'll try that just yet as I wouldn't want to mess things up.

Edited October 12, 2017 by Chopin

[wls1971]

1 hour ago, Chopin said:

the watch has no issue but it simply wouldn't start

I would say thats an issue a watch that only shows the correct time twice a day.

1 hour ago, Chopin said:

Is it possible that mine just requires removing the stem and crown somehow and then the movement dial and caseback comes out ?

Without pictures its impossible to fully understand the type of case you are dealing with.

 

1 hour ago, Chopin said:

Do 2 piece stems just require that you pull them out with a bit of force or must you make any special movements or anything like that ? Not saying that I'll try that just yet as I wouldn't want to mess things up

Yes but they must be pulled out without bending them a lot of people adapt cannon pinion pullers to do the job Bergeon did make a tool for the job 6889

 

[Chopin]

Here are some pictures off the net of my watch. Mine doesn't have the small space between the case and the crown.

Edited October 14, 2017 by Chopin

[Marc]

I suspect that it's a front loader. Every Tissot that I have worked on that referenced a key to open has been a front loader; there's always an exception though.

It's quite possible that the case is made in two parts which are pressed together for the ease of manufacturing but they are not intended to be separated. You quite often see this with front loader gold plated cases that have stainless steel backs.

 

[vinn3]

the two part case wrist watch is not to common.  some very good watches were made that way  ( girard  perregaux )  the problem is ,  with age,  they tend to "fall apart". (no longer a press fit)   after service,  should one glue the two parts together ?

[anilv]

You need this.

http://www.ebay.co.uk/itm/VINTAGE-1969-TISSOT-SEASTAR-SEVEN-KEYS-CRYSTAL-REMOVERS-Watch-Tool-/201536386371

A crystal lifter will work as well. The stem will be a two part.

Anilv