It's hard to tell by looking but this sure does look as if it could be the proper 5256 with the wrong rotor, or a full 5206.
The key is that the 5256 is simply a higher grade movement than the 5206. As such the rotor can be swapped with ease. They may be the case here, or it could be the whole movement is 5206.
Can you post another pic with the rotor on the other side so we can see the rest of the movement?
Does your dial indicate Chronometer ? If so the movement should be 5256 with a corresponding unique ID number stamped on the movement bridge. Can't tell from here.
The key is that the 5256 is simply a higher grade movement than the 5206. As such the rotor can be swapped with ease. They may be the case here, or it could be the whole movement is 5206.
Can you post another pic with the rotor on the other side so we can see the rest of the movement?
Does your dial indicate Chronometer ? If so the movement should be 5256 with a corresponding unique ID number stamped on the movement bridge. Can't tell from here.
