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Thanks Scott, got it apart. Without breaking any thing lol

Ok the crystal is installed from the inside of the case, measures 25mmX25mm at the sealing flange (has a gasket as well) and is slightly curved (on its bottom face) equally corner to center on all sides. The protruding portion of the crystal starts at approx23.66X23.66 at the flange and tapers  to about 23mm at the outer face. The top of the crystal is ever so slightly domed. There is also a lip under 25mm bottom flange of about 23.5mm.. So it steps from 23.5 to 25 to23.66 then slopes to 23 at the face.

So the movement is sealed into the back by a gasket to the crystal, all tossed into the front case and then pinned TIGHTLY by 4 pins.....very cool but a huge PITA to dissasemble.

Probably have to cut a new gasket crystal is pretty good, just a few minor scratches.

Any ideas on a model with this crystal data?