Spenke & Metzl "Dresdner Model"
prima del restauro.

Spenke & Metzl DRESDNER 28 inch. model, 
this is the one that arrived in our workshop.
 

 Spenke & Metzl "Dresdner Model"
a lavoro ultimato.

Here is the same timpani
at the end of the restoration!
 

Spenke & Metzl "Dresdner Model"
particolare del meccanismo, prima del restauro.

Dresdner timpani - the complete mechanism of tuning, before the reconstruction.

Spenke & Metzl "Dresdner Model", stesso particolare del meccanismo, dopo il restauro. 

Dresdner timpani - the same tuning mechanism, after the restoration work!