Killer patina - i wouldnt even think of polishing IMO as the weathered look, looks really cool.

It has "MP" pressed near the top of calf so i am assuming it stands for Military Police.

I dont see sizing info so you'll have to with the measurements i provide below:

Outsole length 11 5/8th"

Width 4"

Heel 1"

Shaft circumference 15"

Shaft height 16"

Ankle circumference 11" but obviousley its adjustable with shoe lace.

In good overall condition, heel has only minimal wear as you can see. Brown leather. 

You will need to replace the laces.