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Tissot Sidéral Bullheard


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Hello you all! 
Been following for a while but au do not post much. 
i am currently working on my recently acquired Tissot 40750 Sidéral Bullhead Chronograph. Amazing watch! 
My friend helped me with the service and he used it to teach me several things. Now I am dealing with the case. I cleaned as I could the rests of gaskets in the pushers and crown. But I a not sure I got everything…. And I cannot find information on what I should replace it with. The case being in plastic I cannot just put it into acetone to dissolve what is left. 
any advice on how to proceed, on the particular construction of those pushers, or anything else would be greatly appreciated. 
 

also if anyone has a lead in where to find an original crystal! 😉

 

thanks for reading 

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    • Are there any areas on the case where there is still what looks like plating? It just looks like solid tarnished metal from what I can see. If it was plated, it would still be intact between the lugs, and it doesn't look any different to the sides. It's odd that the bezel is a different colour.  I would just try to polish it, and see how it comes out.  Plating is not that difficult - though it is a bit of an art to get perfect results. Power supplies are not expensive, about the same as the chemicals you would need. I copper plate first, as it sticks to most metals, fills defects and forms a good base layer for whatever you plate on top -  nickel in my case.  As @praezis suggests, if you want it plating, take it to a plating company for advice.  
    • Looking at the photos I'd say it was an underlay crystal and the bezel will need to come off.
    • A bergeon one would be about the best money can buy. I'm not sure how much they are now for a new one. But they pop up on ebay from time to time for about 50 quid,  you want the small adjustable platform as well that sets up the spacing on the crystal to leave room on it when fitting it bsck into the case bezel. 
    • An inexpensive generic crystal lift, under $20 on Esslinger.com, is fine to remove the crystal on a vintage watch and fine to reinsert one. If you start working on more valuable watches, getting a better crystal lift might be necessary since these cheaper ones can be a little rough in the jaws. If you are not careful it is easier to scratch a crystal with these than with a $120 version. The other difference is in how smooth the screw action is on the more expensive Swiss one.  It does take some practice no matter what to install a crystal with this tool, and you can expect to not get your first one or two right without some scratches when installing. But if @caseback is right and this is a 2 piece case, then it opens up other better options to install a new crystal with a press of some sort instead.
    • Thanks Neverenough.  That's exactly why I posted this.  I'd rather wear it dirty than destroy it. I took a high powered magnifier and looked all along the crystal and found no evidence of prying, so my presupposition was that the glass came off.  I'd never heard of a crystal lift, and don't have one.   Is there one you recommend?  Would one from Amazon suffice for my purposes?  
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