Minden Museum Railway

The Minden Museum Railway or MEM was founded in 1977 as a society. Its aim was to preserve historic railway vehicles and operate them on the Minden District Railway . It was not long before the first museum train worked the line. The museum's vehicles were initially housed in the coach hall of the MKB's old locomotive depot at Minden Stadt station.

In the same year the MEM gained its first locomotives:
The MEM's steam engines Mevissen 4 and the Prussian T 13, STETTIN 7906 were taken over from the VEB Erfurt Industrial Railway.
At the same time during that first year, locomotives were inspected and repaired on behalf of other museum railways.

Wikipedia