For anyone familiar with Pietzsch’s Complete School for the Trumpet (link), and his equally famous 22 Virtuoso Studies (link), you will feel right at home in these duets. They are published as two separate booklets which is a sign that Pietzsch expected these duets to be performed, each player on his own stand. As casual duets they work wonderfully, not too hard to read down, but with enough nuance that you could work them up for performance in master classes or recitals.
I have included the first duet in the samples, so grab a friend and try them out. When you are ready, you can purchase a complete PDF download above.