A few words on some of the diesels seen.
Both diesels had prime mover and traction equipment from Electro Motive (EMD).

Mz 1423:
Build by Nohab, delivered to DSB 13/10 1970.
The unit was part of the second batch of Mz units, which finished the steam operations with DSB in 1970.
The unit is equipped with a 16-645E engine equal to the one found in the SD40 series.
Guess the sound made someone feel quite homesick?
Later, the unit was rebuild with HEP (and the boiler removed), painted in the red/black design and fitted with a silencer for the exhaust.

Mx 1023:
Build by Nohab, delivered to DSB 15/9 1961.
The unit is equipped with a normally aspirated 12-567D1 engine (not the most used engine in north America).
The Mx units got a very good silencer - thus the units do not emit as much noise as many other units equipped with GM-EMD diesel engines.
The Mx class did not see the same amount of re-building as the Mz class during their lifespan.
Yes, the unit was later re-painted in red/black.
The unit was later sold from DSB and it is still in service with the company CFL.

I don't have a clue about which train numbers we see on the pictures; others have to revert on this.