The neck is too narrow to be able to feel the inside surface. Using a wood chop stick I sensed it was not smooth, more so at the wider portions of the piece. Would that point to 'mold blown' perhaps?
I stuck the chop stick tip in the concavity which gives the illusion of a raised diamond looking at the piece from a distance.
I compared the pitcher/ewer to a known Dorflinger piece under black lighting. The pitcher/ewer is more yellow.
The third photo shows the beautiful cutting, St. Louis Diamond or honeycomb).