Op2 Six Sonatas (v.1) (score form)

Six Sonatas Op. 2 Vol. 1 by Telemann
For two flutes
Edited by Gunter Hauswald
Published by Barenreiter 
Urtext edition
Score only

These are considered by many to be among the best duets ever written for any instrument.  Telemann's superb use of counterpoint, the equality of the two parts, the abundance of ideas and the overall sheer beauty of the writing, have made these duets a longtime favorite of all flutists. 

Sonata in G (TWV 40:101) | Sonata in e (TWV 40:102) | Sonata in D (TWV 40:103)