The popular universal 2.5 ring gag bit with waterford mouthpiece.
Genuine Neue schule, stamped NS but this is an older model and is priced accordingly.
It has some wear and discolouration to the mouthpiece but still completely functional.
Ideal if you are wanting to try this bit for the first time, but not pay "new neue schule" money.
Condition and measurements shown in the pictures.