Exactly ! Much confussion but it is not a "Heavy Duck". Same as a pre 64 Pigeon gun that was sent back to the factory for engraveing . It may be thought of as a Super Pigeon but it is not .
There is no confussion! True, the guns weren't marked "Heavy Duck", but they were cataloged as such. In the 1960,1961,1962,& 1963 catalogs they are listed as "Magnum Duck Gun".
They looked like a field grade but they were set up different. The stock was shorter and had a factory Solid recoil pad(the late models had a vented recoil pad). They have a lead weight in the stock. They had plane or soild rib, 30 or 32 inch barrels. The barrel steel was thicker, and were marked with the "FOR SUPER X AND SUPER SPEED" 3" chamber. The Full choke was specially bored.