copy after Anton Walter, Vienna around 1795
keyboard compass: F₁ - g³ (5 octaves and one note)
triple strung in the treble, otherwise two strings per note
Viennese action ("Prellzungenmechanik")
naturals ebony, sharps covered by bone
2 kneelevers (forte, moderator )

copy after Louis Dulcken, München around 1815
keyboard compass: 6 octaves (F₁ - f⁴)
Viennese action ("Prellzungenmechanik")
3 pedals (forte, moderator, una-corda)

copy after J.J. Könnicke, Wien around 1790
keyboard compass: 5 octaves (F₁ - f³)
Viennese action ("Prellzungenmechanik") 2 kneelevers (forte, moderator)