I found this info regarding the finish on the Supermatic Trophys:
John J. Stimson, Jr.
Blued
Sun May 4 08:03:30 2003
68.58.70.54
Rick,
In the 102-104 series guns the super blue was the Trophy finish and it appears on Supermatic Trophys with the 5.50", 6.75", 7.25", 8.0" and 10.0" barrels - the 6.75", 8.0" and 10.0" barrels are sometimes referred to as "Space Gun Barrels". The super blue also appeared on the 103 Olympic ISU model called the Olympic Trophy. A few 106 series Trophys also recieved the super blue.
Super bluing in the result of super polishing of the metal before bluing and not the bluing bath itself. All the guns used the same bluing tanks. The polishing associated with the super blue was labor intensive and economics caused later Trophys to be pretty much the same finish as the other guns.
Rust bluing is a process requiring a lot of time and labor and is not compatable with high production. Hot tank bluing is generally used by all manufacturers today. S&W at one time blued their guns by heating the metal in a hot oven.
we call iron oxide rust. Iron oxides appear as a redish brown oxide Fe2 O3 and a black oxide Fe3 O4. So technically rust bluing and hot tank bluing are both "rust".
John Stimson