|Collection Abbreviation||D-Ilshofen: Thalheimer|
|Material Body||cocobolo with ebonite beak|
|Material Mounts||2 nickel silver ferrules; beak ebonite-sheathed|
|Material Keys||nickel silver|
|Notes||Distributor's mark on beak: NAGEL|
Mark on beak: D.R.G.M. 1. 249 532 / D.R.G.M. 1 248 339
The Deutches-Reichs-Gebrauchs Muster (a sort of patent) for ebonite recorder blocks was issued to Rudolf Otto in 1932; that for the ebonite sheathing on the beak was issued in 19323.
Otto supplied this model exclusively to the firm Adolph Nagel in Hanover. Franz Julius Giesbert noted of a corresponding soprano recorder that "... the sound is slightly softer than the soprano recorder made entirely of Cocopolo [sic]".
Thalheimer (2013: 122-123)