Normally a blend of all four steep slope grand crus from Immich:  Batterieberg, Zeppwingert, Ellergrub, and Steffensberg; but this year the Ellergrub fruit from blue slate dominates to scintillating effect. Mostly old and ungrafted vines — at least 60 years old — the vinous heritage of Germany expressed in a generously affordable bottle. Dry every vintage, and especially electric and precise in 2021. One of the star wines of the estate, and dollar-for-quality, the best value.  
Note:  Benefits from a little air; in fact a bottle of this we opened recently was still kicking and delicous after four days.