Sounds like we have the same cymbals! Do you have any info on them...year made or who made them? The listing had them as brass...is this true? They look more like b20 or b8 than brass to me.
The only fact I have is I got them used in 1979 and still have them. Definitely a bronze of some kind. I`ve not been able to find anything else about them. Re-inverted the bottom one a few times now. They`re good rock sound.