What Rega cartridge has a gray body?


I recently purchased a Linn turntable that came with a pair of Rega cartridges. The one mounted on the 'table is an Elys, but the other is an unkown. It has a gray colored body, but is the same shape and style as other Rega cartridges.

Any idea what this cartridge is?

Thanks,
Shawn
jnsluft