antique drott excavator.

Speaking of Drott excavators, I just picked this one up to clean out my silt laden pond. I've googled to death and can't find anything like this machine except for a single youtube video of the exact same machine. It has a 6V Detroit Diesel in it that runs like it's brand new. Not sure if it's a 53, but probably. Hydraulics are weak and I'm trying to identify the model of the excavator in the hopes of finding filters

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