Look up Pickle Server or Pickle Spike or Spear. You'll see that they have different three prong designs to remove a pickle Perhaps from a gallon jar, AKA bar chow. All of those designs feature the central spike, just like yours. Most of the designs have side arms to force the pickle off the spike, not hold it on.
So, we have a potential reference point re: the spear, OK if we're not spearing pickles, what has a similar shape, is softer and slicker, but no fibrous center like a pickle?
A pickled sausage, fatty, slimy and even harder to keep on a fork than a pickle, also bar chow. Note the eye in the handle for hanging on a wall. This implies institutional use rather than an accessory for someone's home kitchen.
You didn't necessarily have to push the ring down, you could just squeeze the forks in to keep the item on the spike.
You might also look at this from a Kosher standpoint. Hebrew folk are much more particular about how their food is handled, as this also is prescribed by the Tora. With respect to that you might not find an exact image on the net.
Perhaps a necessity for a delicatessen?