The DR Mercer is a beautiful made model tracktor. Engenering wice it is a bit flimsy but still of fabulous quality. This here model is the Type 1, the simplest of the two types available. The Type 1 like this one do not have a pressure gauge to read the steam pleassure, in addition there are also a couple of other minor differences.
Mechanical movement on the Mercer's are really what all these fine models is all about. This make the sound like no other and though, prone to leak a bit of condenced steam here and there, it is still in all it's glory a true marvel to behold.
One of the absolute finest models I have. A joy to run.