Don't know. They could be for 501/505's. Also, replacement dials need to be ordered by case reference, not movement caliber. A dial may attach properly to a particular movement caliber, but that doesn't mean that the dial/movement combination will fit inside a particular case. Too small, and there is a gap between the crystal and dial. Too large, and the movement won't fit inside the case at all. This makes the Watchco dials virtually worthless based only on the caliber info in the listing. gatorcpa