Lew,
That cartridge is an Airy 3, not a UNIverse. The "G" stands for gold coils ("S" = silver, "X" = copper).
It looks like a UNIverse because the original UNIverse was the top model in ZYX's "Airy" family of cartridges, which also included the Airy 3, Airy 2 and R-100 Fuji (possibly others, I forget). All "Airy" cartridges used the same polycarbonate body. Except for the model name on the faceplate they are visually indistinguishable except upon very close inspection. (Example: the UNIverse has a sapphire backplate vs. a cheaper material for the lower models. This would be difficult to see in a photo and there's no other visible difference unless you can see different cantilever materials or the effects of cryoing.)
You can see pix of several ZYX cartridges here
Needle Doctor ZYX page. Rows 4 and 5 include several Airy-family models, including an Airy 3G. Note the visual similarities...
One correction to Jmcgrogan2's post: the 4D/Atmos is quite different from the Airy family of cartridges. Its body is less substantial and wide open on the sides and bottom - a semi-nude design. This same body is used for the new UNIverse II. There are 4D pix on that Needle Doctor page if you want to see the difference.