Sorry to resurrect an old thread, but I been looking for information on a gun very similar to yours.
Here's what I've found so far: The gun has 2 pheasant on one side of the receiver, 2 ducks on the other side and a Quail(maybe) on the bottom. It is marked SILE NY, NY-MAR MADE IN ITALY 12 GA-3" on the barrel. I think the MAR stands for Marocchi. There is a makers mark on the receiver right by the Serial# that looks like a mountain in a circle, and another one on the bottom of the barrels right next to the Serial #. This mark is actually an "M" inside a circle and is the makers mark for Marocchi armi. Marocchi told me the gun was made in 1985. I'm suspecting the model is a Field Master.
Mine doesn't have the checkering on the Stock and Forearm, has a 26" barrel and is fixed cylinder bore on both barrels. From all of my research I'm thinking it is a decent blue collar OU from a quality, if little known in the US, Italian gun maker.
Marocchi's website: http://www.marocchiarms.com/index.php
A gun very similar to yours and what it sold for: http://www.gunauction.com/search/displayitem.cfm?itemnum=9376585
The reason I am researching this gun is that the one I purchased has a broken stock and I need to replace it. Does anybody know where I might be able to find one? Marocchi is looking, but I doubt they have one, since the gun is so old. Numrich is out of stock and not expecting to get anymore. Lastly Hoosier Gun Works has a box of unknown stocks that they bought from Sile, but they need my receiver to see if they "MIGHT" have a matching stock.
Any additional info you guys have would be helpful.