Though much information about the maker is unknown, the instrument is of a design very similar to those German instruments which have survived from the second quarter of the 18th century (Eichentopf, Scherer, etc.). Interestingly, the instrument has an Eb key which is placed on the other side of the long joint, to be used by the left hand little finger (uncommon for bassoons at the time).
It being a new instrument, the Orriols/Wietfeld hasn't appeared in a major recording yet (to my knowledge), but I have found a live performance of Carles Cristobal (who discovered the original instrument) playing a Vivaldi concerto for bassoon. It is very likely he's playing the Wietfeld.
|The little finger Eb key|
Stay tuned for the next instrument, an original W. Milhouse, c.1800.