|Collection Abbreviation||D-Ilshofen: Thalheimer|
|Material Mounts||2 nickel silver ferrules|
|Material Keys||nickel silver|
|Notes||Distributor's mark: C.A. Wunderlich / Siebenbrunn (Vgtl.)|
One of the keys is for the lowermost finger-hole; the other, operated by the little finger of the uppermost hand, opens a hole between fingerholes 4 and 5 to give a b♮'. This construction is to be found in instruments built by Otto for Hermann J. Moeck in Celle after 1945. These keys were subsequently adopted by other workshops.
Thalheimer (2013: 127)