This is a Zenith 11544 carburetor for a Silver King 41 farm tractor or Continental power unit.  It may also have other applications including Allis Chalmers so please do your homework to be sure it fits your application.  It is fresh from an old collector's estate where it lived in retirement for many years.  It seems to be in good, used condition with no cracks, breaks, or repairs of any kind that I can see or know of.  Both shafts move as they should and have very little noticeable wear.  It mounts with two holes 2 7/16 inches apart on center.  The hole where it mounts is 1 inch in diameter and the intake hole is 1 3/16 inches in diameter.  These original 11544 carburetors are pretty tough to find in the wild or even at swap meets so if you've been looking for one for an authentic restoration here's a very nice one.  Let the pictures be your guide.  I can always be reached at 262 573 193 1 if you'd like to talk about it.  Good Luck.