This little piggy is a little different in the "bank" category. The hole is there underneath but is sealed with some thin material and painted with orange...view photos.  Side has instructions for removing the "cork" to remove money so I assume you punch out the hole and find a cork to reuse the bank.  I first thought that it had been altered.  But research on ebay showed me photos of the bottoms of other A.N. Brooks piglets.  They had that same "seal" in their photos. They were all  different colors... blue, yellow, red.  7 inches long x 4&1/2 inches tall.

Marked A.N.Brooks Corp, Chicago, ILL USA (with a copyright symbol)  1973