Hi there,
here I am with another recon problem. I know almost nothing on Shermans, so I hope someone can help me doing the job.
Thanks in advance for your time and kindness

First one:




Second one:

The top three are of a Sherman that had been fitted with a bulldozer blade (noticed a complete example in one of your other posts). From the rear view I'd say its based on an early M4. Again, going from the rear view, the bottom three could be an early M4A2 (or M4A4, wheel spacing seems larger to me, but that could just be the photo angle). It was obviously used as a command tank, hence the extra ariel base on the front.

The first three photographs seems to be of a Sherman M4 early, notice the 56° front glacis plate but It has one piece transmission cover that was also used in early M4 Shermans or maybe a latter modification. It also has the aditional armor protection for the amo stowage in the hull sides, so it hasn´t wet amo stowage. You can also see the early gun mount. The cupola looks strange it´s not like the ones used in early M4.
The second one may be a early M4A2.

The top one is an M4 (75) Dry with attachments for a dozer blade while the bottom one is an M4A4 (75) Dry.

Great pics Fabio,
I agree with Adam's ID of these two. A good point about the cupola on the M4 Dozer not being standard.....possibly it is the same cupola that was added by the British when they converted Shermans to Crab Flails. But from the angle shown it is a little hard to tell.