by GaryG » Mon Nov 17, 2014 1:33 pm
GMDH-1 - Four were built. Two each of two different horsepower ratings.
GMDH-3 - Only one was built. Single ended, single engine, three axles (no truck).
There was not an official GMDH-2 as far as I can see. Perhaps internally within GMD, they considered the two power variations of the GNDH-1 as a 1 and 2 but the sold models all show as GMDH-1's.
GaryG