1962 Mack B73

More info ovr yonder @ our local truck 4M
https://www.hcvc.com.au/forum/oldjunk/20528-ford-h47-ck-excavator

Only 3 rams like normal for the boom and dipper, it is all very complicated affair
I think the pins get shifted in the boom when you do heavier work
Hydraulics have come a long way 
This is hydraulic over hydraulic so no electronics to give drama
But in pretty poor condition which doesn't help at all
 
Paul 

the local scrap yard has two with sticks like that. they have swivel grapple claws on the end.

I've never seen a boom/stick like that before. Must have four pistons on it! Would like to see it working. Nice pictures Paul, glad to see the ol'girl still earning her keep.    .....Hippy

That’s interesting. I didn’t know such a creature existed