That's a very nice Merkava II... I wouldn't care for the non-slip surface, I have the book Merkava I, II, III Israel's Chariot of Fire from Concord Publications Company. In that book there are a lot of pics of Merkava IIs and most of them lack the non-slip surface, even in the Merkava III pics, "Mahatz", the pre-production tank, lacks the surface. The Academy Merkava III depicts this tank, so I'll detail most of it, but I won't make the non-slip surface as the tank in the pics clearly lacks it. Thanks for sharing. Most regards.
José