Not sure it’s a one-off, it seems fairly elaborate with those curved armour plates. But it’s proving frustratingly hard to find out more about that US Navy one — what part of, “Google, I want things that refer to the
Navy” doesn’t that stupid site understand?
But in trying that, I did come across yet another, captioned as a “Caterpillar D-8 Tractor with Armored Cab”:
(
source)
Also this one, showing the cab being fitted to one of the bulldozers in the photo Patrice posted:
At least, it’s most likely one of those, because that shows seven with the same armour plating, and these plywood templates for that have “7 required” and “14 required” written on them:
