The Grade 2 Syracuse/Hollenbeck gun came standard with Damascus barrels (the "pattern" to which you refer); and were never cataloged with fluid steel barrels. Grade 2 barrel steel was later referred to as "Improved Damascus"; and after about serial number 8,000, that name was roll-stamped atop the right barrel. SAC's Improved Damascus barrels exhibited a beautiful pattern; but were lower quality Damascus tubes, as this model retailed for only about $35 out the door. If you wish to know more about SAC guns, the various grades, different models, features, etc; an entire series has been published in the Double Gun Journal. I would suggest you contact folks at the DGJ if you are interested in having those articles and information; they have a web site.