We really need a dedicated Certina thread and a place to share our experience with Certina watches.
I give you the most sought after Certina model there is. Maybe not the most expensive but one of the hardest to find in good condition.
The amagnetic and this one is from 1964 and was only sold as a special model fore those that needed extra protection. These have either 014 or 114 cases and are a little thicker then the 012, 013, 112 and 113 cases.
I had a lot of trouble getting it open and failed with the superglue method as there wasn't enough metal to glue against but I found a old case key that fit perfectly and had a long handle so opened it was. Automatics has this special case back and the manual models only have the toad. The first generation of Certina DS only had a blank caseback though.
No, those scratches are not my doing but others failing to have it opened.
Under the caseback one finds the rubber suspension and a thick inner lid. I had to use a case knife to get the lid off as it was snap fit against the movement holder.
Pure perfection (Certina Caliber 25-651) so I had to take my time when servicing it and after it was done it ran +/- 1 second in six positions so this movement has not run much over the years. Observe one needs to remove the movement holder before one can remove the rotor. Why I say this is because you need to remember to install the rotor before the movement holder and before one puts on the hands as well.
Even the dial is extra thick and goes against the movement holder.
Sorry for the colors in some of the pictures but they were only for me and posting them was only a after thought..