Anyone knows how to open Tissot, Nuevo Horizonte case

Hi all,


I need help identifying how to open this vintage Tissot dress watch.


It’s a thin gold-tone case, with only “Tissot” and Nuevo Horizonte visible on the caseback. I can’t see clear screw-back notches, so I’m unsure whether it’s a snap-back or a front-loader.


One lug is bent, and before I try to straighten or repair it, I want to remove the crystal and movement/dial to avoid damaging them.


Other observations:

verdigris around the lug area after removing the old strap
very thin case with a faint seam, but no obvious opening point

Can anyone tell me:

how this case should be opened
whether the movement comes out through the back or front
what tool or method is safest here

Any help is appreciated. Thanks.

Update: I managed to pry off the crystal/bezel, and now I can see the movement side. The movement and dial are still attached as a unit and seem to remain mounted to the case/back somehow.


Before I force anything further:

• should I first remove the crown/stem and look for movement tabs/clamps or a spacer ringor is?
• hand removal needed at this stage?

My assumption is that the hands should stay on for now, and that the next step is to release the stem and then free the movement/dial assembly from the case. If anyone recognizes this construction, I’d appreciate guidance on the correct order.

Also, there is no “Swiss Made” marking on the dial. Does that by itself suggest a redial, or can that be correct for some export-market Tissots? I’ve heard that some South American-market Tissots, possibly including Nuevo Horizonte examples, may lack “Swiss Made,” but I have not been able to verify that.

Any advice is welcome before I do something stupid.

Thank you. I gave it another go with more confidence and managed to pop the back open.
Really glad I didn’t force a non-existent split stem 😁