Landwasserschlepper, or LWS from the German Army in WWII.
HO scale resin model with photo-etched parts.
The tracks and propulsion are PE.
This is a very big model, you can see that by comparison with a Roco Tiger II.
The LWS is much longer, taller, and about the same width as the Tiger II.
It is a resin model but fairly easy to put together.
It builds up into a great kit.
I like it so well I got a couple of them.