Yes, that is an older version of our NWB-110 skimmer. The number on that was assigned by the shop that sold it to you, not by us.
The water depth range on that skimmer is 7-8" of water. It does not matter if the outflow valve is above or under water as long as the skimmer is in 7-8" of water.
The skimmer started overflowing the because the filter media changed the water tension. That should only be temporary.