Hi Pete
Its on page 7 of the electronic version of the Nordische Lander brochure on the following link:
https://www.primareisen.com/prima-kataloge/
Basically - dates are Saturdays 4/6/16 until 2/7/16 for the GCI flight.
Just as an aside - example of a longish DH4 -flight would be LNZ-AOK on Tuesdays block time of 3h20