What diode is this?

I found hundreds of old diodes with writings all faded. I think printed on it was
MMR
501
750
The leads are thick i think they are high voltage or high current rated?

No luck on search engines. Would like to know the specs so i can reuse them. Anyone?

It could be Motorola MR501

750 could well be the year and week of production

I think you are right. Almost looks the same. Thanks