Check SheafferTarga.com for the list of models and finishes. Its a great resource.
Not all of the brushed finishes are stainless steel. Some are brushed, plated brass. The brushed stainless was introduced in 1980, the brushed chrome 1989.
You do get to where you can see the difference in the finish, but the tip off is that the brushed chrome pens have a metal thread bushing on the barrel, while the brushed stainless pens do not - the threads are part of the barrel liner. Having said that, a standard repair that I make if the barrel liner cracks or breads, is to remove part of the plastic barrel liner and install one of the metal thread bushings. But in general I think its safe to say that the stainless barrels don't have the thread bushing.
Visit Main Street Pens
A full service pen shop providing professional, thoughtful vintage pen repair...
Please use email, not a PM for repair and pen purchase inquiries.