M21.004 was delivered to the Jindřichohradeckých místních drah railway in 1939. It moved to Presov and then Nitra before it was renovated with a John Deere engine and put into service at the Čiernohronská železnica railway in 2004.
M21.006 was delivered as M21.007 to the Třemešná – Osoblaha railway in 1947. It moved to Považská lesná železnica railway in 1961 where it was renumber M21.006.