How to Open Fiberglass Case

[Lawren5]

I need some advise on how to open a Tissot Sidereal with fiberglass case. The back does not open so the movement must be removed from the front. What I can't figure out is how to remove the crown and stem.

[jdrichard]

I had a front load case and the stem was actually 2 pieces. You had to grab the stem and stiffly pull it out and it releases from the other half. Then the watch can be removed. No guarantee and wait for more advice.


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[jdrichard]

Perhaps it’s friction fit ??


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[BobHadababyitsaboy]

Pry off the bezel first. If the crystal doesn't come out after that you'll have to pry that out too. Most likely it's a two-piece stem, but if you find yourself trying too hard to separate it, send more pics before forcing anything.

[jdm]

This is one of the most often asked questions in this forum. Note that normally a rotating bezel does not need to be removed in order to pop out the crystal. 

 

 

[Nucejoe]

The case can break/ crack  around the bezel, take extreme care as you,

Pry the bezel in three or for positions, before you crack open.

Crystal can easily be lifted with regulars crystal lift, I can do it with a knife

The stem is a two pieceR.

[Lawren5]

I applied some muscle and was able to pull the stem out and surprisingly it was not a two-piece stem as was expected. I noticed that the stem has two conical sections which work with a spring loaded post. Once the stem had been removed, a sharp knife was used to get underneath and remove the bezel. The crystal was removed with a crystal lift and the movement could then be lifted out.

[jdrichard]

You did not break anything?


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[Lawren5]

Nothing broken. I've since disassembled the movement and all looks good.

[jdrichard]

Nothing broken. I've since disassembled the movement and all looks good.

Good stuff


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[watchweasol]

Hi  any chance of a picture of the keyless work as to how the stem was held in the movement. I also notice that the lower end of the stem is also chamfered to allow re fitting .

[Lawren5]

Watchweasol - I've posted a couple of pictures as you have requested. The keyless works isn't much different than any other except that it uses a chamfered stem and a setting lever stud instead of a screw. The setting lever is held in place by the setting lever spring. Depressing the stud allows for easy removal of the stem. When the movement is in the case, pulling on the stem causes the chamfered section of the stem to hit the setting lever overcoming the spring tension, raising the setting lever and allowing stem removal.