Checking some cartridges in my collection I found one from I cannot say for sure if it is copper washed or not. It’s not in the list I have (Foester?)
Headstamp emp St+ 5 44
Except the primer he’s all magnetic
The coating is not lacq, the case has a typical coppershine colour, the rim is a little bit rusty and I give just my five cents for copper washed.