From the importer:
Another village level off-dry, this is sourced from various parcels on the “Grand Cru” Kupp – as such this is more the equivalent of “Senior,” in a Feinherb style. In other words, it is a “Grand Cru” declassified and sold at village-level pricing. (You’ll note “Senior” and the “Fass 3” pricing are in fact exactly aligned.) This tends to be a bit deeper and broader-shouldered than the Fass 4; it has more mineral complexity and more depth. The analytics are similar to the Fass 4, so expect lightning bolts and some dizziness