Bookends Bronze Shoes on Light Green Marble? Marble Jade?

6½"L x 3.5"W x 4"H

Weight: 4 lbs. 6oz.

I'm not sure what the kind of stone this is. It looks similar to Marbel Jade, but it extremely heavy. I don't know how heavy a slab of marble jade this size would weigh, but I would imagine it not being this heavy which is why I wonder it may be a kind of Marble.

The shoes are completely Bronze as there appears to be natural Bronze petina on the inside of the shoes as well areound the grooves of the shoeslaces and realistic wrinkles and creases.

These belonged to my neighbor. They had a garage sale a few years back and these caught my eye, as strange old things often do, so I bought them for $5.

I couldn't seem to find any markings inside or out indicating any maker or item number. However, underneath the toe of the left shoe there appears to be an 8 or 9 digit number. It is very hard to see as the toe is raised less than an inch up so they could just be more wrinkles or realistic technique marks. I put a small flat mirror under there to see if I could read exactly what it was, but was only able to read part of the number, which part was difficult to make out toop but easier to read than before at least. The numbers I could kinda see were "3443...." I'm not sure.

Thanks for your expertise advice! Have a beautiful Day!