Grado Sonata Cartridge marked RP?

I just ordered a Grado cartridge and it came. I opened it up and it is marked "RP" on the top of the cartridge. I would think this means it is really a "Reference Platinum".

Did I get "taken"?

Any help would be appreciated.


My Sonata is marked with RS on the top. The Platinum and Sonata look almost identical. Why don't you contact Grado and ask? Who did you buy it from?
In fact I did contact Grado. Store thinks its their problem. I assume it was a mistake in pakaging. Grado agrees this is a Platinum. So I am working it out between the vendor and Grado.

Thanks for the help!